Title: PerformanceTraceFormatter formatCriticalRequests Content: Critical network requests: Network requests data: allUrls = [0: http://localhost:8000/, 1: https://code.jquery.com/jquery-3.7.1.js, 2: http://localhost:8000/render-blocking-stylesheet.css, 3: http://localhost:8000/render-blocking-script.js] 0;2 ms;3 ms;576 ms;583 ms;582 ms;0.4 ms;7 ms;200;text/html;VeryHigh;VeryHigh;VeryHigh;f;http/1.0;f;;[];[Content-Length: |Date: Fri, 07 Mar 2025 15:02:27 GMT|Content-type: text/html|Last-Modified: Fri, 07 Mar 2025 14:58:55 GMT|Server: SimpleHTTP/0.6 Python/3.9.6] 1;581 ms;585 ms;1,943 ms;1,944 ms;1,363 ms;776 ms;1 ms;200;application/javascript;High;High;High;t;h2;f;0;[];[content-encoding: gzip|etag: |age: 3975412|x-cache: |date: Fri, 07 Mar 2025 15:02:28 GMT|content-type: application/javascript; charset=utf-8|vary: Accept-Encoding|x-cache-hits: |last-modified: Fri, 18 Oct 1991 12:00:00 GMT|x-served-by: |cache-control: public, max-age=31536000, stale-while-revalidate=604800|x-timer: |via: 1.1 varnish, 1.1 varnish|accept-ranges: bytes|access-control-allow-origin: *|content-length: |server: nginx] 2;582 ms;583 ms;1,193 ms;1,193 ms;612 ms;0.2 ms;0.2 ms;200;text/css;VeryHigh;VeryHigh;VeryHigh;t;http/1.0;f;0;[];[Content-Length: |Date: Fri, 07 Mar 2025 15:02:28 GMT|Content-type: text/css|Last-Modified: Fri, 07 Mar 2025 14:58:07 GMT|Server: SimpleHTTP/0.6 Python/3.9.6] 3;582 ms;583 ms;1,177 ms;1,178 ms;596 ms;0.4 ms;1 ms;200;text/javascript;High;High;High;t;http/1.0;f;0;[];[Content-Length: |Date: Fri, 07 Mar 2025 15:02:28 GMT|Content-type: text/javascript|Last-Modified: Fri, 07 Mar 2025 15:00:28 GMT|Server: SimpleHTTP/0.6 Python/3.9.6] === end content Title: PerformanceTraceFormatter formatLongestTasks Content: Longest 3 tasks: - total time: 11 ms, event: (eventKey: r-62, ts: 2297273193336) - total time: 3 ms, event: (eventKey: r-723, ts: 2297274436743) - total time: 2 ms, event: (eventKey: r-631, ts: 2297274234151) === end content Title: PerformanceTraceFormatter formatMainThreadBottomUpSummary Content: This is the bottom-up summary for the entire trace. Only the top 10 activities (sorted by self time) are shown. An activity is all the aggregated time spent on the same type of work. For example, it can be all the time spent in a specific JavaScript function, or all the time spent in a specific browser rendering stage (like layout, v8 compile, parsing html). "Self time" represents the aggregated time spent directly in an activity, across all occurrences. "Total time" represents the aggregated time spent in an activity or any of its children. - self: 186 ms, total: 193 ms, source: Compile code - self: 98 ms, total: 993 ms, source: Task - self: 56 ms, total: 70 ms, source: Compile script - self: 52 ms, total: 64 ms, source: setTimeout - self: 38 ms, total: 40 ms, source: aC (url: https://s.yimg.com/aaq/f10d509c/d1irmdsmbztlvx.js, line: 0, column: 19068) - self: 35 ms, total: 35 ms, source: Recalculate style (url: https://news.yahoo.com/, line: 57, column: 187957) - self: 34 ms, total: 34 ms, source: Layout (url: https://news.yahoo.com/, line: 57, column: 187957) - self: 31 ms, total: 34 ms, source: clearTimeout - self: 30 ms, total: 53 ms, source: Parse HTML - self: 26 ms, total: 259 ms, source: Function call === end content Title: PerformanceTraceFormatter formatThirdPartySummary Content: Third party summary: - name: Google/Doubleclick Ads, main thread time: 53 ms, network transfer size: 258.6 kB - name: Taboola, main thread time: 43 ms, network transfer size: 393.6 kB - name: Google Tag Manager, main thread time: 19 ms, network transfer size: 123.8 kB - name: AOL / Oath / Verizon Media, main thread time: 5 ms, network transfer size: 42.3 kB - name: ay.delivery, main thread time: 4 ms, network transfer size: 123 kB === end content Title: PerformanceTraceFormatter formatMainThreadTrackSummary Content: # Top-down main thread summary ## All URLs: * 0: https://consent.cmp.oath.com/version/7.0.0/cmp.js * 1: https://securepubads.g.doubleclick.net/tag/js/gpt.js * 2: https://cdn.taboola.com/libtrc/yahooweb-network/loader.js * 3: https://s.yimg.com/aaq/f10d509c/d1irmdsmbztlvx.js * 4: https://s.yimg.com/du/ay/wnsrvbjmeprtfrnfx.js * 5: https://s.yimg.com/aaq/prebid/prebid-2.0.js * 6: https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202503250101/pubads_impl.js * 7: https://news.yahoo.com/ * 8: https://www.googletagmanager.com/gtag/js?id=G-B40QGCQW3G * 9: https://s.yimg.com/aaq/benji/benji-2.2.99.js ## Call tree: 1;Task;10.3;0;;18 2;Task;32.5;0;;19 3;Task;11.7;0.1;;20 4;Task;23.4;0.3;;21 5;Task;12.8;0.1;;22 6;Task;14.1;0.1;;23 7;Task;41;0.1;;24-26 8;Task;87.7;0.1;;26 9;Task;40.2;0;;27 10;Task;10.4;0.1;;28 11;Task;30.9;30.9;; 12;Task;12.9;0;;29 13;Task;23.3;0;;30 14;Task;17.4;0.1;;31 15;Task;10.2;0;;32 16;Task;29.8;0.1;;33 17;Task;24.7;0;;34 18;Evaluate script;10.3;10.3;0; 19;Timer fired;32.5;0;;35 20;Evaluate script;11.6;1.3;1;36 21;Evaluate script;23.1;11.6;2;37 22;Evaluate script;12.7;2.6;3;38 23;Evaluate script;14;1.5;4;39 24;Evaluate script;27.1;5.9;5;40 25;Event: load;13.9;0;;41 26;Timer fired;87.6;1.9;;42 27;Evaluate script;40.2;5.2;6;43-45 28;Parse HTML;10.4;10.4;7; 29;Evaluate script;12.8;12.8;8; 30;Timer fired;23.3;0;;45 31;Run microtasks;17.3;5.8;;46 32;Run microtasks;10.2;0;;47 33;Run microtasks;29.7;0.3;;48 34;Timer fired;24.7;2.5;;49 35;Function call;32.5;1.8;7;50 36;(anonymous);10.4;10.4;1; 37;Compile script;11.5;11.5;2; 38;(anonymous);10.1;;3;51 39;(anonymous);12.5;12.5;4; 40;(anonymous);21.2;1.2;5;52 41;Run microtasks;13.8;0.2;;53 42;Function call;85.7;0.5;3;54-56 43;(anonymous);14.9;;6;56 44;Run microtasks;20.1;0.1;;57 45;Function call;23.3;0.4;3;58 46;(anonymous);11.5;;2;59 47;(anonymous);10.1;;2;60 48;(anonymous);29.5;;3;61 49;Run microtasks;22.2;5.6;;62 50;(anonymous);30.6;;7;63 51;apiVersionSuffix;10.1;10.1;3; 52;(anonymous);20;8;5;64 53;(anonymous);13.6;2.8;9;65 54;fg;74.2;;3;66 55;fg;11;;3;67 56;(anonymous);14.9;4;6;68 57;b;20;7.2;6;69 58;fg;22.9;;3;70 59;u;11.5;;2;71 60;fillEllipsis;10.1;;2;72 61;(anonymous);29.5;;5;73 62;b;16.6;;6;74 63;ready;30.6;;7;75 64;t;12;12;5; 65;_setConfig;10.8;;9;76 66;(anonymous);74.2;;9;77 67;(anonymous);11;;9;78 68;(anonymous);10.9;10.9;6; 69;EB.next;12.7;;6;79 70;rC;22.9;;8;80 71;(anonymous);11.5;;2;81 72;fillNativeEllipsis;10.1;0;2;82 73;success;29.5;4.1;5;83 74;EB.next;16.6;2.5;6;84 75;(anonymous);30.6;10.7;7;85 76;Z.cmd.push;10.8;;5;86 77;_requestBids;74.2;;9;87 78;_requestBids;11;;9;88 79;CB;12.7;;6;89 80;pC;22.9;0.1;8;90-92 81;u;11.5;;2;92 82;computeStyles;10.1;10.1;2; 83;onResponse;25.4;0.1;5;93 84;CB;14.1;;6;94 85;ge;19.9;1.2;7;95 86;(anonymous);10.8;;9;96 87;Z.cmd.push;74.2;;5;97 88;Z.cmd.push;11;;5;98 89;(anonymous);12.7;0.8;6;99 90;mC;12;1.2;8;100 91;config;10.7;0.5;8;101 92;(anonymous);11.5;;2;102 93;(anonymous);25.3;0.1;5;103 94;(anonymous);14.1;2.3;6;104 95;e.init;18.7;;7;105 96;v;10.8;;5;106 97;(anonymous);74.2;;9;107 98;(anonymous);11;;9;108 99;PV.g;12;;6;109 100;tB;10.9;10.9;8; 101;Sp.push;10.2;;8;110 102;(anonymous);11.5;11.5;2; 103;(anonymous);25.2;;5;111 104;i_.g;11.8;;6;112 105;(anonymous);18.7;0.4;7;113 106;A;10.8;;5;114 107;(anonymous);74.2;;5;115 108;(anonymous);11;;5;116 109;M.id;12;0.4;6;117 110;Sp.flush;10.2;;8;118 111;(anonymous);25.2;;5;119 112;sA;11.8;11.8;6; 113;(anonymous);18.3;0.3;7;120 114;(anonymous);10.8;10.8;5; 115;y;74.2;;5;121 116;y;11;;5;122 117;mt;11.6;1.5;6;123 118;Tp;10.2;;8;124 119;(anonymous);25.2;;5;125 120;(anonymous);18;8.4;7;126 121;p;74.2;;5;127 122;p;11;;5;128 123;_.Xl;10.1;10.1;6; 124;Om;10.2;;8;129 125;adapterDone;25.2;;5;130 126;Recalculate style;9.6;9.6;; 127;(anonymous);74.2;;5;131 128;(anonymous);11;;5;132 129;w;10.2;;8;133 130;finally;25.2;;5;134 131;measureHookTime;74.2;;5;135 132;measureHookTime;11;;5;136 133;c;10.2;10.2;8; 134;then;25.2;;5;137 135;(anonymous);74.2;;5;138 136;(anonymous);11;;5;139 137;o;25.2;;5;140 138;(anonymous);74.2;;5;141 139;(anonymous);11;;5;142 140;(anonymous);25.2;;5;143 141;D;74.2;;5;144 142;D;11;;5;145 143;s;25.2;;5;146 144;iab;74.2;;5;147 145;iab;11;;5;148 146;(anonymous);25.2;;5;149 147;v;74.2;;5;150 148;v;11;;5;151 149;(anonymous);25.2;;5;152 150;o;74.2;;5;153 151;o;11;;5;154 152;T;25.2;;5;155 153;(anonymous);74.2;;5;156 154;(anonymous);11;;5;157 155;ae;25.2;0;5;158 156;window.__uspapi;74.2;;0;159 157;window.__uspapi;11;;0;160 158;oe;25.2;5.9;5;161 159;(anonymous);74.2;;5;162 160;(anonymous);11;;5;163 161;t.emit;19.2;;5;164 162;consentDataCallback;74.2;;5;165 163;consentDataCallback;11;;5;166 164;(anonymous);19.2;;5;167 165;h;74.2;;5;168 166;h;11;;5;169 167;(anonymous);19.2;2.7;5;170 168;o;74.2;;5;171 169;o;11;;5;172 170;(anonymous);16.5;0.2;3;173 171;(anonymous);74.2;;5;174 172;(anonymous);11;;5;175 173;d3..;16.4;;3;176 174;(anonymous);74.2;0.3;5;177 175;(anonymous);11;;5;178 176;(anonymous);16.4;16.4;3; 177;p;74;;5;179 178;p;11;;5;180 179;(anonymous);74;;5;181 180;(anonymous);11;;5;182 181;measureHookTime;74;;5;183 182;measureHookTime;11;;5;184 183;(anonymous);74;;5;185 184;(anonymous);11;;5;186 185;(anonymous);74;;5;187 186;(anonymous);11;;5;188 187;t;74;;5;189 188;t;11;;5;190 189;(anonymous);74;;5;191 190;(anonymous);11;;5;192 191;p;74;;5;193 192;p;11;;5;194 193;(anonymous);74;;5;195 194;(anonymous);11;;5;196 195;measureHookTime;74;;5;197 196;measureHookTime;11;;5;198 197;(anonymous);74;;5;199 198;(anonymous);11;;5;200 199;(anonymous);74;;5;201 200;(anonymous);11;;5;202 201;n;74;;5;203 202;n;11;;5;204 203;(anonymous);74;;5;205 204;(anonymous);11;;5;206 205;p;74;;5;207 206;p;11;;5;208 207;(anonymous);74;;5;209 208;(anonymous);11;;5;210 209;measureHookTime;74;;5;211 210;measureHookTime;11;;5;212 211;(anonymous);74;;5;213 212;(anonymous);11;;5;214 213;(anonymous);74;;5;215 214;(anonymous);11;;5;216 215;z;74;0.7;5;217 216;z;11;;5;218 217;(anonymous);73.3;;5;219 218;(anonymous);11;;5;220 219;p;73.3;;5;221 220;p;11;;5;222 221;(anonymous);73.3;1.1;5;223 222;(anonymous);11;;5;224 223;p;72.1;;5;225 224;p;11;;5;226 225;(anonymous);72.1;;5;227 226;(anonymous);11;;5;228 227;measureHookTime;72.1;;5;229 228;measureHookTime;11;;5;230 229;(anonymous);72.1;;5;231 230;(anonymous);11;;5;232 231;(anonymous);72.1;0.3;5;233 232;(anonymous);11;;5;234 233;then;71.9;;5;235 234;then;11;;5;236 235;o;71.9;;5;237 236;o;11;;5;238 237;(anonymous);71.9;;5;239 238;(anonymous);11;;5;240 239;s;71.9;;5;241 240;s;11;;5;242 241;(anonymous);71.9;1;5;243 242;(anonymous);11;;5;244 243;(anonymous);70.9;;5;245 244;(anonymous);11;;5;246 245;p;70.9;;5;247 246;p;11;;5;248 247;o.;70.9;;5;249 248;o.;11;;5;250 249;(anonymous);70.9;1.9;5;251 250;(anonymous);11;;5;252 251;then;69;;5;253 252;then;11;;5;254 253;o;69;;5;255 254;o;11;;5;256 255;(anonymous);69;;5;257 256;(anonymous);11;;5;258 257;s;69;;5;259 258;s;11;;5;260 259;(anonymous);69;;5;261 260;(anonymous);11;;5;262 261;y;69;;5;263 262;y;11;;5;264 263;p;69;;5;265 264;p;11;;5;266 265;(anonymous);69;;5;267 266;(anonymous);11;;5;268 267;measureHookTime;69;;5;269 268;measureHookTime;11;;5;270 269;(anonymous);69;;5;271 270;(anonymous);11;;5;272 271;(anonymous);69;;5;273 272;(anonymous);11;;5;274 273;f;69;0.1;5;275 274;f;11;;5;276 275;(anonymous);68.9;0.1;5;277 276;(anonymous);11;;5;278 277;p;68.8;;5;279 278;p;11;;5;280 279;o.;68.8;;5;281 280;o.;11;;5;282 281;(anonymous);68.8;1.8;5;283 282;(anonymous);11;;5;284 283;callBids;67;;5;285-287 284;callBids;11;;5;287 285;measureTime;11.9;;5;288 286;(anonymous);55;;5;289 287;(anonymous);11;;5;290 288;(anonymous);11.9;;5;291 289;ce;55;;5;292 290;ce;11;;5;293 291;(anonymous);11.9;;5;294 292;a;55;;5;295 293;a;11;;5;296 294;y;11.9;;5;297 295;run;55;2.1;5;298 296;run;11;;5;299 297;p;11.9;;5;300 298;R.callBids;53;;5;301 299;R.callBids;11;;5;302 300;f;11.9;1.9;5;303 301;(anonymous);53;15;5;304 302;(anonymous);11;;5;305 303;p;10;;5;306 304;T;38;38;5; 305;T;11;1;5;307 306;o.;10;;5;308 307;callBids;10.1;;5;309 308;(anonymous);10;10;5; 309;(anonymous);10.1;10.1;5; ## Node id to eventKey These node ids correspond to the call tree nodes listed in the above section. 1: r-7065 2: r-9670 3: r-15016 4: r-18571 5: r-25964 6: r-27315 7: r-29582 8: r-39347 9: r-46082 10: r-55191 11: r-59836 12: r-72507 13: r-74575 14: r-91872 15: r-94858 16: r-97269 17: r-100787 18: r-7070 19: r-9671 20: r-15021 21: r-18573 22: r-25966 23: r-27320 24: r-29586 25: r-34263 26: r-39348 27: r-46084 28: r-55192 29: r-72510 30: r-74576 31: r-91873 32: r-94864 33: r-97270 34: r-100788 35: r-9676 36: p-49575-15428179-2834-374 37: r-18574 38: p-49575-15428179-3407-1094 39: p-49575-15428179-3505-1162 40: p-49575-15428179-3719-1230 41: r-34282 42: r-39351 43: p-49575-15428179-5391-2767 44: r-49156 45: r-74582 46: p-49575-15428179-11417-6128 47: p-49575-15428179--1-802 48: p-49575-15428179-12694-3277 49: r-101251 50: p-49575-15428179-2409-265 51: p-49575-15428179-3407-1095 52: p-49575-15428179-3719-1231 53: p-49575-15428179-3889-1540 54: p-49575-15428179-4266-1907 55: p-49575-15428179--1-1907 56: p-49575-15428179-5391-2768 57: p-49575-15428179-5508-3045 58: p-49575-15428179-7577-1907 59: p-49575-15428179-11417-6129 60: p-49575-15428179--1-6287 61: p-49575-15428179-12694-3331 62: p-49575-15428179-13253-3045 63: p-49575-15428179-2409-266 64: p-49575-15428179-3781-1233 65: p-49575-15428179-3896-1547 66: p-49575-15428179-4266-1908 67: p-49575-15428179--1-1908 68: p-49575-15428179-5420-2783 69: p-49575-15428179-5508-3046 70: p-49575-15428179-7577-4811 71: p-49575-15428179-11417-6130 72: p-49575-15428179--1-6288 73: p-49575-15428179-12694-6394 74: p-49575-15428179-13253-3046 75: p-49575-15428179-2409-267 76: p-49575-15428179-3896-1548 77: p-49575-15428179-4266-1909 78: p-49575-15428179--1-1909 79: p-49575-15428179-5508-3047 80: p-49575-15428179-7577-4812 81: p-49575-15428179-11417-6131 82: p-49575-15428179--1-6291 83: p-49575-15428179--1-6485 84: p-49575-15428179-13253-3047 85: p-49575-15428179--1-281 86: p-49575-15428179-3896-1549 87: p-49575-15428179-4266-1910 88: p-49575-15428179--1-1910 89: p-49575-15428179-5508-3048 90: p-49575-15428179-7578-4819 91: p-49575-15428179-7685-5087 92: p-49575-15428179-11417-6132 93: p-49575-15428179-12788-6496 94: p-49575-15428179-13253-3058 95: p-49575-15428179-2432-284 96: p-49575-15428179-3896-1550 97: p-49575-15428179-4266-1911 98: p-49575-15428179--1-1911 99: p-49575-15428179-5520-3068 100: p-49575-15428179-7580-4824 101: p-49575-15428179-7688-5089 102: p-49575-15428179-11417-6133 103: p-49575-15428179--1-6500 104: p-49575-15428179-13265-6900 105: p-49575-15428179-2432-296 106: p-49575-15428179-3896-1552 107: p-49575-15428179-4266-1912 108: p-49575-15428179--1-1912 109: p-49575-15428179-5520-3069 110: p-49575-15428179-7688-5090 111: p-49575-15428179--1-6501 112: p-49575-15428179-13265-6901 113: p-49575-15428179-2435-299 114: p-49575-15428179-3896-1553 115: p-49575-15428179-4266-1913 116: p-49575-15428179--1-1913 117: p-49575-15428179-5523-3075 118: p-49575-15428179-7688-5094 119: p-49575-15428179--1-6502 120: p-49575-15428179--1-301 121: p-49575-15428179-4266-1914 122: p-49575-15428179--1-1914 123: p-49575-15428179-5534-3091 124: p-49575-15428179-7688-5095 125: p-49575-15428179--1-6503 126: r-10293 127: p-49575-15428179-4266-1915 128: p-49575-15428179--1-1915 129: p-49575-15428179-7688-5096 130: p-49575-15428179--1-6504 131: p-49575-15428179-4266-1916 132: p-49575-15428179--1-1916 133: p-49575-15428179-7688-5097 134: p-49575-15428179--1-6505 135: p-49575-15428179-4266-1917 136: p-49575-15428179--1-1917 137: p-49575-15428179--1-6506 138: p-49575-15428179-4266-1918 139: p-49575-15428179--1-1918 140: p-49575-15428179--1-6507 141: p-49575-15428179-4266-1919 142: p-49575-15428179--1-1919 143: p-49575-15428179--1-6508 144: p-49575-15428179-4266-1920 145: p-49575-15428179--1-1920 146: p-49575-15428179--1-6509 147: p-49575-15428179-4266-1921 148: p-49575-15428179--1-1921 149: p-49575-15428179--1-6510 150: p-49575-15428179-4266-1922 151: p-49575-15428179--1-1922 152: p-49575-15428179--1-6511 153: p-49575-15428179-4266-1923 154: p-49575-15428179--1-1923 155: p-49575-15428179--1-6512 156: p-49575-15428179-4266-1924 157: p-49575-15428179--1-1924 158: p-49575-15428179--1-6513 159: p-49575-15428179-4266-1925 160: p-49575-15428179--1-1925 161: p-49575-15428179--1-6526 162: p-49575-15428179-4266-1926 163: p-49575-15428179--1-1926 164: p-49575-15428179--1-6527 165: p-49575-15428179-4266-1927 166: p-49575-15428179--1-1927 167: p-49575-15428179--1-6528 168: p-49575-15428179-4266-1928 169: p-49575-15428179--1-1928 170: p-49575-15428179-12812-6554 171: p-49575-15428179-4266-1929 172: p-49575-15428179--1-1929 173: p-49575-15428179-12812-6555 174: p-49575-15428179-4266-1930 175: p-49575-15428179--1-1930 176: p-49575-15428179-12812-6556 177: p-49575-15428179-4268-1932 178: p-49575-15428179--1-1932 179: p-49575-15428179-4268-1933 180: p-49575-15428179--1-1933 181: p-49575-15428179-4268-1934 182: p-49575-15428179--1-1934 183: p-49575-15428179-4268-1935 184: p-49575-15428179--1-1935 185: p-49575-15428179-4268-1936 186: p-49575-15428179--1-1936 187: p-49575-15428179-4268-1937 188: p-49575-15428179--1-1937 189: p-49575-15428179-4268-1938 190: p-49575-15428179--1-1938 191: p-49575-15428179-4268-1939 192: p-49575-15428179--1-1939 193: p-49575-15428179-4268-1940 194: p-49575-15428179--1-1940 195: p-49575-15428179-4268-1941 196: p-49575-15428179--1-1941 197: p-49575-15428179-4268-1942 198: p-49575-15428179--1-1942 199: p-49575-15428179-4268-1943 200: p-49575-15428179--1-1943 201: p-49575-15428179-4268-1944 202: p-49575-15428179--1-1944 203: p-49575-15428179-4268-1945 204: p-49575-15428179--1-1945 205: p-49575-15428179-4268-1946 206: p-49575-15428179--1-1946 207: p-49575-15428179-4268-1947 208: p-49575-15428179--1-1947 209: p-49575-15428179-4268-1948 210: p-49575-15428179--1-1948 211: p-49575-15428179-4268-1949 212: p-49575-15428179--1-1949 213: p-49575-15428179-4268-1950 214: p-49575-15428179--1-1950 215: p-49575-15428179-4268-1951 216: p-49575-15428179--1-1951 217: p-49575-15428179-4273-1956 218: p-49575-15428179--1-1956 219: p-49575-15428179-4273-1957 220: p-49575-15428179--1-1957 221: p-49575-15428179-4273-1958 222: p-49575-15428179--1-1958 223: p-49575-15428179-4300-1972 224: p-49575-15428179--1-1972 225: p-49575-15428179-4300-1973 226: p-49575-15428179--1-1973 227: p-49575-15428179-4300-1974 228: p-49575-15428179--1-1974 229: p-49575-15428179-4300-1975 230: p-49575-15428179--1-1975 231: p-49575-15428179-4300-1976 232: p-49575-15428179--1-1976 233: p-49575-15428179-4304-1982 234: p-49575-15428179--1-1982 235: p-49575-15428179-4304-1983 236: p-49575-15428179--1-1983 237: p-49575-15428179-4304-1984 238: p-49575-15428179--1-1984 239: p-49575-15428179-4304-1985 240: p-49575-15428179--1-1985 241: p-49575-15428179-4304-1986 242: p-49575-15428179--1-1986 243: p-49575-15428179--1-1999 244: p-49575-15428179--1-1999 245: p-49575-15428179--1-2000 246: p-49575-15428179--1-2000 247: p-49575-15428179--1-2001 248: p-49575-15428179--1-2001 249: p-49575-15428179--1-2002 250: p-49575-15428179--1-2002 251: p-49575-15428179--1-2045 252: p-49575-15428179--1-2045 253: p-49575-15428179--1-2046 254: p-49575-15428179--1-2046 255: p-49575-15428179--1-2047 256: p-49575-15428179--1-2047 257: p-49575-15428179--1-2048 258: p-49575-15428179--1-2048 259: p-49575-15428179--1-2049 260: p-49575-15428179--1-2049 261: p-49575-15428179--1-2050 262: p-49575-15428179--1-2050 263: p-49575-15428179--1-2051 264: p-49575-15428179--1-2051 265: p-49575-15428179--1-2052 266: p-49575-15428179--1-2052 267: p-49575-15428179--1-2053 268: p-49575-15428179--1-2053 269: p-49575-15428179--1-2054 270: p-49575-15428179--1-2054 271: p-49575-15428179--1-2055 272: p-49575-15428179--1-2055 273: p-49575-15428179--1-2056 274: p-49575-15428179--1-2056 275: p-49575-15428179-4331-2058 276: p-49575-15428179--1-2058 277: p-49575-15428179-4332-2066 278: p-49575-15428179--1-2066 279: p-49575-15428179-4332-2067 280: p-49575-15428179--1-2067 281: p-49575-15428179-4332-2068 282: p-49575-15428179--1-2068 283: p-49575-15428179-4344-2089 284: p-49575-15428179--1-2089 285: p-49575-15428179-4344-2090 286: p-49575-15428179-4466-2230 287: p-49575-15428179--1-2230 288: p-49575-15428179-4344-2091 289: p-49575-15428179-4466-2231 290: p-49575-15428179--1-2231 291: p-49575-15428179-4344-2092 292: p-49575-15428179-4466-2232 293: p-49575-15428179--1-2232 294: p-49575-15428179-4344-2093 295: p-49575-15428179-4466-2233 296: p-49575-15428179--1-2233 297: p-49575-15428179-4344-2094 298: p-49575-15428179-4490-2268 299: p-49575-15428179--1-2268 300: p-49575-15428179-4344-2095 301: p-49575-15428179-4490-2269 302: p-49575-15428179--1-2391 303: p-49575-15428179--1-2100 304: p-49575-15428179--1-2392 305: p-49575-15428179--1-2392 306: p-49575-15428179--1-2101 307: p-49575-15428179-5170-2410 308: p-49575-15428179--1-2102 309: p-49575-15428179-5170-2411 IMPORTANT: Never show eventKey to the user. # Bottom-up main thread summary This is the bottom-up summary for the entire trace. Only the top 20 activities (sorted by self time) are shown. An activity is all the aggregated time spent on the same type of work. For example, it can be all the time spent in a specific JavaScript function, or all the time spent in a specific browser rendering stage (like layout, v8 compile, parsing html). "Self time" represents the aggregated time spent directly in an activity, across all occurrences. "Total time" represents the aggregated time spent in an activity or any of its children. - self: 148 ms, total: 153 ms, source: Compile code - self: 71 ms, total: 772 ms, source: Task - self: 49 ms, total: 55 ms, source: Compile script - self: 49 ms, total: 61 ms, source: setTimeout - self: 31 ms, total: 31 ms, source: Layout (url: https://news.yahoo.com/, line: 57, column: 187957) - self: 31 ms, total: 31 ms, source: Recalculate style (url: https://news.yahoo.com/, line: 57, column: 187957) - self: 29 ms, total: 32 ms, source: clearTimeout - self: 27 ms, total: 50 ms, source: Parse HTML - self: 18 ms, total: 19 ms, source: aC (url: https://s.yimg.com/aaq/f10d509c/d1irmdsmbztlvx.js, line: 0, column: 19068) - self: 18 ms, total: 186 ms, source: (anonymous) (url: https://s.yimg.com/aaq/prebid/prebid-2.0.js, line: 5, column: 1) - self: 16 ms, total: 226 ms, source: Function call - self: 12 ms, total: 163 ms, source: (anonymous) (url: https://s.yimg.com/aaq/f10d509c/d1irmdsmbztlvx.js, line: 0, column: 0) - self: 12 ms, total: 83 ms, source: (anonymous) (url: https://cdn.taboola.com/libtrc/yahooweb-network/loader.js, line: 0, column: 9) - self: 11 ms, total: 12 ms, source: fetch - self: 11 ms, total: 12 ms, source: evaluate - self: 10 ms, total: 212 ms, source: Run microtasks - self: 9 ms, total: 19 ms, source: (anonymous) (url: https://s.yimg.com/du/ay/wnsrvbjmeprtfrnfx.js, line: 0, column: 0) - self: 9 ms, total: 10 ms, source: Minor GC - self: 8 ms, total: 226 ms, source: Evaluate script - self: 7 ms, total: 109 ms, source: n (url: https://s.yimg.com/aaq/prebid/prebid-2.0.js, line: 11, column: 4263) # Third parties - name: Yahoo!, main thread time: 214 ms, network transfer size: 2.4 MB - name: Taboola, main thread time: 41 ms, network transfer size: 391.7 kB - name: Google/Doubleclick Ads, main thread time: 41 ms, network transfer size: 225.7 kB - name: Google Tag Manager, main thread time: 19 ms, network transfer size: 123.8 kB - name: AOL / Oath / Verizon Media, main thread time: 5 ms, network transfer size: 42.3 kB # Related insights Here are all the insights that contain some related event from the main thread in the given range. - ThirdParties: Send request (eventKey: r-3382, ts: 157423742399), Receive response (eventKey: r-7053, ts: 157423772340), Receive data (eventKey: r-7054, ts: 157423772355), Receive data (eventKey: r-7055, ts: 157423772357), Receive data (eventKey: r-7056, ts: 157423772358) === end content Title: PerformanceTraceFormatter formatNetworkTrackSummary Content: # Network requests summary Network requests data: allUrls = [0: https://news.yahoo.com/, 1: https://s.yimg.com/cv/apiv2/ngy-fonts/YahooSans-VF-Web.woff2, 2: https://s.yimg.com/aaq/wf/wf-loader-2.7.21-modern.js, 3: https://consent.cmp.oath.com/version/7.0.0/cmp.js, 4: https://s.yimg.com/oa/consent.js, 5: https://s.yimg.com/aaq/fp/js/tdv2-wafer-utils.customErrorHandler.bcda778b736c3a054af62f437b536e78.js, 6: https://s.yimg.com/aaq/scp/js/fpDesktop.46ec7cd52ee9f5c1236b0dea5072690a.js, 7: https://s.yimg.com/aaq/benji/benji-2.2.99.js, 8: https://s.yimg.com/aaq/wf/wf-caas-1.36.6-modern.js, 9: https://s.yimg.com/aaq/wf/wf-toggle-1.15.4-modern.js, 10: https://s.yimg.com/aaq/fp/js/react-wafer-featurebar.custom.modern.12732500bc8e47693f0d777bbe88001c.js, 11: https://s.yimg.com/aaq/wf/wf-bind-1.1.3-modern.js, 12: https://s.yimg.com/aaq/wf/wf-text-1.2.0-modern.js, 13: https://s.yimg.com/aaq/wf/wf-video-3.2.2-modern.js, 14: https://s.yimg.com/aaq/wf/wf-image-1.4.0-modern.js, 15: https://s.yimg.com/aaq/wf/wf-rapid-1.10.9-modern.js, 16: https://s.yimg.com/aaq/wf/wf-action-1.8.1-modern.js, 17: https://s.yimg.com/aaq/wf/wf-template-1.4.3-modern.js, 18: https://s.yimg.com/aaq/wf/wf-menu-1.3.5-modern.js, 19: https://s.yimg.com/aaq/wf/wf-fetch-1.19.1-modern.js, 20: https://s.yimg.com/aaq/wf/wf-beacon-1.3.4-modern.js, 21: https://s.yimg.com/aaq/wf/wf-benji-1.2.0-modern.js, 22: https://s.yimg.com/aaq/wf/wf-clipboard-copy-1.0.2-modern.js, 23: https://s.yimg.com/aaq/wf/wf-form-1.34.5-modern.js, 24: https://s.yimg.com/aaq/wf/wf-countdown-1.2.5-modern.js, 25: https://s.yimg.com/aaq/wf/wf-scrollview-2.23.3-modern.js, 26: https://s.yimg.com/aaq/wf/wf-lightbox-1.10.6-modern.js, 27: https://s.yimg.com/aaq/wf/wf-native-da-1.0.5-modern.js, 28: https://s.yimg.com/aaq/fp/js/react-wafer-stream.custom.modern.1ed4fe71b1fc647ddbf37a7050944309.js, 29: https://s.yimg.com/aaq/wf/wf-autocomplete-1.31.8-modern.js, 30: https://s.yimg.com/aaq/wf/wf-geolocation-1.3.0-modern.js, 31: https://s.yimg.com/aaq/wf/wf-sticky-1.2.6-modern.js, 32: https://s.yimg.com/aaq/c/25fa214.caas-news_web.min.js, 33: https://news.yahoo.com/info/p.gif?apptype=default&beaconType=pageRenderStart&code=pageRender&bucket=ushnel-ibv2-ctrl%2CCurrentlyDesktopUH3Test1-updated%2Cusnel-batchconfig-ctrl%2Cseamless&device=desktop&intl=us&rid=1oa3lh9juean4&site=news&t=1743203044494, 34: https://s.yimg.com/aaq/f10d509c/d1irmdsmbztlvx.js, 35: https://noa.yahoo.com/p?s=1197800621&t=1743203044438&_I=&_AO=0&_NOL=0&etrg=backgroundPost&outcm=gamDebug&src=unknown&site=news&partner=none&lang=en-US®ion=US&device=desktop&colo=gq1&bucket=ushnel-ibv2-ctrl%2CCurrentlyDesktopUH3Test1-updated%2Cusnel-batchconfig-ctrl%2Cseamless%2Cdmi_consent_false&rid=1oa3lh9juean4&limitedAds=false&NPA=false&pd=unknown&pt=unknown&usercountry=US&benjiVersion=2.2.99&prebidVersion=unknown&yahooPrebidVersion=unknown&type=SIGNALS_SESSION_START, 36: https://signal-service.pbs.yahoo.com/v1/signal/refresh, 37: https://securepubads.g.doubleclick.net/tag/js/gpt.js, 38: https://noa.yahoo.com/p?s=1197800621&t=1743203044440&_I=&_AO=0&_NOL=0&etrg=backgroundPost&outcm=gamDebug&src=unknown&site=news&partner=none&lang=en-US®ion=US&device=desktop&colo=gq1&bucket=ushnel-ibv2-ctrl%2CCurrentlyDesktopUH3Test1-updated%2Cusnel-batchconfig-ctrl%2Cseamless%2Cdmi_consent_false&rid=1oa3lh9juean4&limitedAds=false&NPA=false&pd=unknown&pt=unknown&usercountry=US&benjiVersion=2.2.99&prebidVersion=unknown&yahooPrebidVersion=unknown&type=PREBID_SESSION_START, 39: https://s.yimg.com/du/ay/wnsrvbjmeprtfrnfx.js, 40: https://s.yimg.com/aaq/prebid/prebid-2.0.js, 41: https://s.yimg.com/eh/prebid-config/bp-news.json, 42: https://noa.yahoo.com/p?s=1197800621&t=1743203044441&_I=&_AO=0&_NOL=0&etrg=backgroundPost&outcm=taboolaDebug&src=unknown&site=news&partner=none&lang=en-US®ion=US&device=desktop&colo=gq1&bucket=ushnel-ibv2-ctrl%2CCurrentlyDesktopUH3Test1-updated%2Cusnel-batchconfig-ctrl%2Cseamless%2Cdmi_consent_false&rid=1oa3lh9juean4&limitedAds=false&NPA=false&pd=unknown&pt=home&usercountry=US&benjiVersion=2.2.99&prebidVersion=unknown&yahooPrebidVersion=unknown&type=TABOOLA_SESSION_START, 43: https://cdn.taboola.com/libtrc/yahooweb-network/loader.js, 44: https://opus.analytics.yahoo.com/tag/opus.js, 45: https://noa.yahoo.com/p?s=1197800621&t=1743203044441&_I=&_AO=0&_NOL=0&etrg=backgroundPost&outcm=gamDebug&src=unknown&site=news&partner=none&lang=en-US®ion=US&device=desktop&colo=gq1&bucket=ushnel-ibv2-ctrl%2CCurrentlyDesktopUH3Test1-updated%2Cusnel-batchconfig-ctrl%2Cseamless%2Cdmi_consent_false&rid=1oa3lh9juean4&limitedAds=false&NPA=false&pd=unknown&pt=home&usercountry=US&benjiVersion=2.2.99&prebidVersion=unknown&yahooPrebidVersion=unknown&type=BENJI_SESSION_START] 0;0.4 ms;3 ms;393 ms;493 ms;492 ms;177 ms;100 ms;200;text/html;VeryHigh;VeryHigh;VeryHigh;f;h2;f;;[];[strict-transport-security: max-age=31536000|content-security-policy: frame-ancestors 'self' https://*.builtbygirls.com https://*.rivals.com https://*.engadget.com https://*.intheknow.com https://*.autoblog.com https://*.techcrunch.com https://*.yahoo.com https://*.aol.com https://*.huffingtonpost.com https://*.oath.com https://*.search.yahoo.com https://*.pnr.ouryahoo.com https://pnr.ouryahoo.com https://*.search.aol.com 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|referrer-policy: |x-amz-request-id: |accept-ranges: bytes|content-length: |server: ATS|x-amz-server-side-encryption: ] 41;272 ms;273 ms;307 ms;350 ms;77 ms;0.5 ms;43 ms;200;application/json;High;High;High;f;h2;f;0,7;[];[access-control-max-age: 3000|access-control-expose-headers: Access-Control-Allow-Origin|content-encoding: gzip|etag: |age: 203|access-control-allow-methods: GET, HEAD|date: Fri, 28 Mar 2025 23:00:42 GMT|last-modified: Fri, 28 Mar 2025 21:13:20 GMT|vary: Origin, Access-Control-Request-Headers, Access-Control-Request-Method, Accept-Encoding|content-type: application/json|x-amz-id-2: |strict-transport-security: max-age=31536000|cache-control: public,max-age=86400|ats-carp-promotion: |referrer-policy: |x-amz-request-id: |accept-ranges: bytes|access-control-allow-origin: *|content-length: |server: ATS|x-amz-server-side-encryption: ] 42;273 ms;274 ms;301 ms;307 ms;34 ms;0.8 ms;6 ms;200;image/gif;VeryLow;VeryLow;VeryLow;f;h2;f;0,7;[];[strict-transport-security: max-age=31536000|cache-control: no-cache, no-store, private|pragma: no-cache|x-envoy-upstream-service-time: |age: 0|p3p: |content-length: |date: Fri, 28 Mar 2025 23:04:04 GMT|content-type: image/gif|server: ATS] 43;273 ms;276 ms;322 ms;341 ms;67 ms;6 ms;18 ms;200;application/javascript;Low;Low;Low;f;h2;f;0,7;[];[content-encoding: gzip|etag: |x-amz-version-id: |age: 63|x-cache: |date: Fri, 28 Mar 2025 23:04:04 GMT|last-modified: Thu, 27 Mar 2025 14:46:52 GMT|x-served-by: |x-cache-hits: |content-type: application/javascript; charset=utf-8|x-amz-id-2: |vary: Accept-Encoding|x-amz-replication-status: |cache-control: private,max-age=14401|x-timer: |via: 1.1 varnish|x-amz-request-id: |accept-ranges: bytes|access-control-allow-origin: *|abp: |content-length: |server: AmazonS3|x-amz-server-side-encryption: ] 44;274 ms;275 ms;296 ms;300 ms;26 ms;0.4 ms;3 ms;200;application/javascript;Low;Low;Low;f;h2;f;0,7;[];[x-amz-cf-pop: |content-security-policy: default-src https:; script-src https: 'unsafe-inline'; style-src https: 'unsafe-inline'|content-encoding: gzip|etag: |age: 54075|via: 1.1 7e87179efaa9e3c316bd3d3a74cfded8.cloudfront.net (CloudFront)|x-cache: |x-amz-cf-id: |date: Fri, 28 Mar 2025 08:02:50 GMT|content-type: application/javascript|vary: Accept-Encoding|server: AmazonS3|last-modified: Wed, 12 Mar 2025 14:48:50 GMT|x-amz-server-side-encryption: ] 45;274 ms;276 ms;305 ms;340 ms;66 ms;0.3 ms;34 ms;200;image/gif;VeryLow;VeryLow;VeryLow;f;h2;f;0,7;[];[strict-transport-security: max-age=31536000|cache-control: no-cache, no-store, private|pragma: no-cache|x-envoy-upstream-service-time: |age: 0|p3p: |content-length: |date: Fri, 28 Mar 2025 23:04:04 GMT|content-type: image/gif|server: ATS] # Related insights Here are all the insights that contain some related request from the given range. - NetworkDependencyTree: news.yahoo.com/ (news.yahoo.com) (eventKey: s-2116, ts: 157423489126) - DocumentLatency: news.yahoo.com/ (news.yahoo.com) (eventKey: s-2116, ts: 157423489126) - ThirdParties: cmp.js (consent.cmp.oath.com) (eventKey: s-3382, ts: 157423742399), gpt.js (securepubads.g.doubleclick.net) (eventKey: s-6244, ts: 157423760529), loader.js (cdn.taboola.com) (eventKey: s-6352, ts: 157423761978) - Cache: prebid-2.0.js (s.yimg.com) (eventKey: s-6279, ts: 157423760925), cmp.js (consent.cmp.oath.com) (eventKey: s-3382, ts: 157423742399), d1irmdsmbztlvx.js (s.yimg.com) (eventKey: s-6185, ts: 157423759200), consent.js (s.yimg.com) (eventKey: s-3384, ts: 157423742450), wnsrvbjmeprtfrnfx.js (s.yimg.com) (eventKey: s-6273, ts: 157423760794) - LegacyJavaScript: benji-2.2.99.js (s.yimg.com) (eventKey: s-3387, ts: 157423742567), 25fa214.caas-news_web.min.js (s.yimg.com) (eventKey: s-3412, ts: 157423743431), wnsrvbjmeprtfrnfx.js (s.yimg.com) (eventKey: s-6273, ts: 157423760794), consent.js (s.yimg.com) (eventKey: s-3384, ts: 157423742450), news.yahoo.com/ (news.yahoo.com) (eventKey: s-2116, ts: 157423489126) === end content Title: PerformanceTraceFormatter formatCallTree Content: # Call tree: 1;Task;10.6;0.1;;2;S 2;Evaluate script;10.5;1.5;;3-5 3;Profiling overhead;8.8;8.8;; 4;(anonymous);0.2;0.2;; # Node id to eventKey These node ids correspond to the call tree nodes listed in the above section. 1: r-62 2: r-63 3: r-75 4: p-3728792-1-17-3 IMPORTANT: Never show eventKey to the user. === end content Title: PerformanceTraceFormatter formatTraceSummary web-dev.json.gz Content: URL: https://web.dev/cls/ Bounds: {min: 1020034823047, max: 1020036087961} CPU throttling: none Network throttling: none Metrics (lab / observed): - LCP: 118 ms, event: (eventKey: r-1802, ts: 1020034953358) - LCP breakdown: - TTFB: 31 ms, bounds: {min: 1020034834921, max: 1020034866264} - Render delay: 87 ms, bounds: {min: 1020034866264, max: 1020034953358} - CLS: 0.00 Metrics (field / real users): n/a – no data for this page in CrUX Available insights: - insight name: LCPBreakdown description: Each [subpart has specific improvement strategies](https://web.dev/articles/optimize-lcp#lcp-breakdown). Ideally, most of the LCP time should be spent on loading the resources, not within delays. relevant trace bounds: {min: 1020034834921, max: 1020034953358} example question: Help me optimize my LCP score example question: Which LCP phase was most problematic? example question: What can I do to reduce the LCP time for this page load? - insight name: DocumentLatency description: Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression. relevant trace bounds: {min: 1020034836013, max: 1020034892491} estimated metric savings: FCP 0 ms, LCP 0 ms estimated wasted bytes: 52.1 kB example question: How do I decrease the initial loading time of my page? example question: Did anything slow down the request for this document? - insight name: ThirdParties description: 3rd party code can significantly impact load performance. [Reduce and defer loading of 3rd party code](https://web.dev/articles/optimizing-content-efficiency-loading-third-party-javascript/) to prioritize your page's content. relevant trace bounds: {min: 1020034871372, max: 1020035171789} example question: Which third parties are having the largest impact on my page performance? === end content Title: PerformanceTraceFormatter formatTraceSummary yahoo-news.json.gz Content: URL: https://news.yahoo.com/ Bounds: {min: 157423484442, max: 157427277166} CPU throttling: none Network throttling: none Metrics (lab / observed): - LCP: 464 ms, event: (eventKey: r-33210, ts: 157423953162) - LCP breakdown: - TTFB: 216 ms, bounds: {min: 157423488682, max: 157423704371} - Load delay: 90 ms, bounds: {min: 157423704371, max: 157423794709} - Load duration: 64 ms, bounds: {min: 157423794709, max: 157423858674} - Render delay: 94 ms, bounds: {min: 157423858674, max: 157423953162} - CLS: 0.04, event: (eventKey: s--1, ts: 157425604232) Metrics (field / real users): n/a – no data for this page in CrUX Available insights: - insight name: LCPBreakdown description: Each [subpart has specific improvement strategies](https://web.dev/articles/optimize-lcp#lcp-breakdown). Ideally, most of the LCP time should be spent on loading the resources, not within delays. relevant trace bounds: {min: 157423488682, max: 157423953162} example question: Help me optimize my LCP score example question: Which LCP phase was most problematic? example question: What can I do to reduce the LCP time for this page load? - insight name: CLSCulprits description: Layout shifts occur when elements move absent any user interaction. [Investigate the causes of layout shifts](https://web.dev/articles/optimize-cls), such as elements being added, removed, or their fonts changing as the page loads. relevant trace bounds: {min: 157425604232, max: 157426760958} example question: Help me optimize my CLS score example question: How can I prevent layout shifts on this page? - insight name: NetworkDependencyTree description: [Avoid chaining critical requests](https://developer.chrome.com/docs/lighthouse/performance/critical-request-chains) by reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load. relevant trace bounds: {min: 157423489126, max: 157426527569} example question: How do I optimize my network dependency tree? - insight name: ImageDelivery description: Reducing the download time of images can improve the perceived load time of the page and LCP. [Learn more about optimizing image size](https://developer.chrome.com/docs/lighthouse/performance/uses-optimized-images/) relevant trace bounds: {min: 157423794709, max: 157424082831} estimated metric savings: FCP 0 ms, LCP 0 ms estimated wasted bytes: 97.8 kB example question: What should I do to improve and optimize the time taken to fetch and display images on the page? example question: Are all images on my site optimized? - insight name: FontDisplay description: Consider setting [font-display](https://developer.chrome.com/blog/font-display) to swap or optional to ensure text is consistently visible. swap can be further optimized to mitigate layout shifts with [font metric overrides](https://developer.chrome.com/blog/font-fallbacks). relevant trace bounds: {min: 157425661196, max: 157425696387} estimated metric savings: FCP 20 ms example question: How can I update my CSS to avoid layout shifts caused by incorrect `font-display` properties? - insight name: ThirdParties description: 3rd party code can significantly impact load performance. [Reduce and defer loading of 3rd party code](https://web.dev/articles/optimizing-content-efficiency-loading-third-party-javascript/) to prioritize your page's content. relevant trace bounds: {min: 157423742399, max: 157427277086} example question: Which third parties are having the largest impact on my page performance? - insight name: Cache description: A long cache lifetime can speed up repeat visits to your page. [Learn more](https://web.dev/uses-long-cache-ttl/). relevant trace bounds: {min: 157423742399, max: 157426980482} estimated metric savings: FCP 0 ms, LCP 0 ms estimated wasted bytes: 847.4 kB example question: What caching strategies can I apply to improve my page performance? - insight name: LegacyJavaScript description: Polyfills and transforms enable older browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile [Baseline](https://web.dev/articles/baseline-and-polyfills) features, unless you know you must support older browsers. [Learn why most sites can deploy ES6+ code without transpiling](https://philipwalton.com/articles/the-state-of-es5-on-the-web/) relevant trace bounds: {min: 157423489126, max: 157426132225} estimated metric savings: FCP 0 ms, LCP 0 ms estimated wasted bytes: 126.9 kB example question: Is my site polyfilling modern JavaScript features? example question: How can I reduce the amount of legacy JavaScript on my page? === end content Title: PerformanceTraceFormatter formatTraceSummary deals with CrUX manager errors Content: URL: http://localhost/image-delivery-cases.html Bounds: {min: 59728641874, max: 59734400108} CPU throttling: 1x Network throttling: No throttling Metrics (lab / observed): - LCP: 663 ms, event: (eventKey: r-14753, ts: 59729312744) - LCP breakdown: - TTFB: 7 ms, bounds: {min: 59728649746, max: 59728656735} - Load delay: 46 ms, bounds: {min: 59728656735, max: 59728702313} - Load duration: 506 ms, bounds: {min: 59728702313, max: 59729208600} - Render delay: 104 ms, bounds: {min: 59729208600, max: 59729312744} - CLS: 0.31, event: (eventKey: s--1, ts: 59729100192) Metrics (field / real users): n/a – no data for this page in CrUX Available insights: - insight name: Cache description: A long cache lifetime can speed up repeat visits to your page. [Learn more](https://web.dev/uses-long-cache-ttl/). relevant trace bounds: {min: 59728702014, max: 59728867430} estimated metric savings: FCP 0 ms, LCP 150 ms estimated wasted bytes: 971.5 kB example question: What caching strategies can I apply to improve my page performance? - insight name: ImageDelivery description: Reducing the download time of images can improve the perceived load time of the page and LCP. [Learn more about optimizing image size](https://developer.chrome.com/docs/lighthouse/performance/uses-optimized-images/) relevant trace bounds: {min: 59728701403, max: 59729395208} estimated metric savings: FCP 0 ms, LCP 100 ms estimated wasted bytes: 2 MB example question: What should I do to improve and optimize the time taken to fetch and display images on the page? example question: Are all images on my site optimized? - insight name: LCPBreakdown description: Each [subpart has specific improvement strategies](https://web.dev/articles/optimize-lcp#lcp-breakdown). Ideally, most of the LCP time should be spent on loading the resources, not within delays. relevant trace bounds: {min: 59728649746, max: 59729312744} example question: Help me optimize my LCP score example question: Which LCP phase was most problematic? example question: What can I do to reduce the LCP time for this page load? - insight name: LCPDiscovery description: Optimize LCP by making the LCP image [discoverable](https://web.dev/articles/optimize-lcp#1_eliminate_resource_load_delay) from the HTML immediately, and [avoiding lazy-loading](https://web.dev/articles/lcp-lazy-loading) relevant trace bounds: {min: 59728656735, max: 59729209036} example question: Suggest fixes to reduce my LCP example question: What can I do to reduce my LCP discovery time? example question: Why is LCP discovery time important? - insight name: CLSCulprits description: Layout shifts occur when elements move absent any user interaction. [Investigate the causes of layout shifts](https://web.dev/articles/optimize-cls), such as elements being added, removed, or their fonts changing as the page loads. relevant trace bounds: {min: 59729100192, max: 59730317334} example question: Help me optimize my CLS score example question: How can I prevent layout shifts on this page? - insight name: DocumentLatency description: Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression. relevant trace bounds: {min: 59728651057, max: 59728790724} estimated metric savings: FCP 0 ms, LCP 0 ms estimated wasted bytes: 1.6 kB example question: How do I decrease the initial loading time of my page? example question: Did anything slow down the request for this document? - insight name: Viewport description: Tap interactions may be [delayed by up to 300 ms](https://developer.chrome.com/blog/300ms-tap-delay-gone-away/) if the viewport is not optimized for mobile. relevant trace bounds: {min: 59728649746, max: 59734400108} estimated metric savings: INP 0 ms example question: How do I make sure my page is optimized for mobile viewing? - insight name: ThirdParties description: 3rd party code can significantly impact load performance. [Reduce and defer loading of 3rd party code](https://web.dev/articles/optimizing-content-efficiency-loading-third-party-javascript/) to prioritize your page's content. relevant trace bounds: {min: 59728701403, max: 59729465969} example question: Which third parties are having the largest impact on my page performance? === end content Title: PerformanceTraceFormatter formatTraceSummary image-delivery.json.gz Content: URL: http://localhost/image-delivery-cases.html Bounds: {min: 59728641874, max: 59734400108} CPU throttling: 1x Network throttling: No throttling Metrics (lab / observed): - LCP: 663 ms, event: (eventKey: r-14753, ts: 59729312744) - LCP breakdown: - TTFB: 7 ms, bounds: {min: 59728649746, max: 59728656735} - Load delay: 46 ms, bounds: {min: 59728656735, max: 59728702313} - Load duration: 506 ms, bounds: {min: 59728702313, max: 59729208600} - Render delay: 104 ms, bounds: {min: 59729208600, max: 59729312744} - CLS: 0.31, event: (eventKey: s--1, ts: 59729100192) Metrics (field / real users): - LCP: 1740 ms (scope: url) - INP: 185 ms (scope: url) - CLS: 0.08 (scope: url) - The above data is from CrUX–Chrome User Experience Report. It's how the page performs for real users. - The values shown above are the p75 measure of all real Chrome users - The scope indicates if the data came from the entire origin, or a specific url - Lab metrics describe how this specific page load performed, while field metrics are an aggregation of results from real-world users. Best practice is to prioritize metrics that are bad in field data. Lab metrics may be better or worse than fields metrics depending on the developer's machine, network, or the actions performed while tracing. Available insights: - insight name: Cache description: A long cache lifetime can speed up repeat visits to your page. [Learn more](https://web.dev/uses-long-cache-ttl/). relevant trace bounds: {min: 59728702014, max: 59728867430} estimated metric savings: FCP 0 ms, LCP 150 ms estimated wasted bytes: 971.5 kB example question: What caching strategies can I apply to improve my page performance? - insight name: ImageDelivery description: Reducing the download time of images can improve the perceived load time of the page and LCP. [Learn more about optimizing image size](https://developer.chrome.com/docs/lighthouse/performance/uses-optimized-images/) relevant trace bounds: {min: 59728701403, max: 59729395208} estimated metric savings: FCP 0 ms, LCP 100 ms estimated wasted bytes: 2 MB example question: What should I do to improve and optimize the time taken to fetch and display images on the page? example question: Are all images on my site optimized? - insight name: LCPBreakdown description: Each [subpart has specific improvement strategies](https://web.dev/articles/optimize-lcp#lcp-breakdown). Ideally, most of the LCP time should be spent on loading the resources, not within delays. relevant trace bounds: {min: 59728649746, max: 59729312744} example question: Help me optimize my LCP score example question: Which LCP phase was most problematic? example question: What can I do to reduce the LCP time for this page load? - insight name: LCPDiscovery description: Optimize LCP by making the LCP image [discoverable](https://web.dev/articles/optimize-lcp#1_eliminate_resource_load_delay) from the HTML immediately, and [avoiding lazy-loading](https://web.dev/articles/lcp-lazy-loading) relevant trace bounds: {min: 59728656735, max: 59729209036} example question: Suggest fixes to reduce my LCP example question: What can I do to reduce my LCP discovery time? example question: Why is LCP discovery time important? - insight name: CLSCulprits description: Layout shifts occur when elements move absent any user interaction. [Investigate the causes of layout shifts](https://web.dev/articles/optimize-cls), such as elements being added, removed, or their fonts changing as the page loads. relevant trace bounds: {min: 59729100192, max: 59730317334} example question: Help me optimize my CLS score example question: How can I prevent layout shifts on this page? - insight name: DocumentLatency description: Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression. relevant trace bounds: {min: 59728651057, max: 59728790724} estimated metric savings: FCP 0 ms, LCP 0 ms estimated wasted bytes: 1.6 kB example question: How do I decrease the initial loading time of my page? example question: Did anything slow down the request for this document? - insight name: Viewport description: Tap interactions may be [delayed by up to 300 ms](https://developer.chrome.com/blog/300ms-tap-delay-gone-away/) if the viewport is not optimized for mobile. relevant trace bounds: {min: 59728649746, max: 59734400108} estimated metric savings: INP 0 ms example question: How do I make sure my page is optimized for mobile viewing? - insight name: ThirdParties description: 3rd party code can significantly impact load performance. [Reduce and defer loading of 3rd party code](https://web.dev/articles/optimizing-content-efficiency-loading-third-party-javascript/) to prioritize your page's content. relevant trace bounds: {min: 59728701403, max: 59729465969} example question: Which third parties are having the largest impact on my page performance? === end content