Performance test compared to `momentjs` and `date-fns` ``` >node -v v8.11.1 ``` ``` Adding fixed amount of days --------------------------------------------------------------- moment 403,713 op/s ± 2.01% (86 samples) 1.00x moment cached 723,429 op/s ± 0.91% (92 samples) 1.79x date-fns 3,361,571 op/s ± 2.25% (89 samples) 8.33x ts-date 3,364,003 op/s ± 2.33% (86 samples) 8.33x Fastest is date-fns,ts-date --------------------------------------------------------------- Adding fixed amount of hours --------------------------------------------------------------- moment 766,279 op/s ± 1.34% (89 samples) 1.00x moment cached 1,736,484 op/s ± 0.27% (94 samples) 2.27x date-fns 3,750,536 op/s ± 0.58% (93 samples) 4.89x ts-date 6,476,659 op/s ± 0.47% (93 samples) 8.45x Fastest is ts-date --------------------------------------------------------------- Difference in days between two dates --------------------------------------------------------------- moment 629,668 op/s ± 0.86% (90 samples) 1.00x moment cached 1,118,435 op/s ± 1.09% (92 samples) 1.78x date-fns 686,129 op/s ± 0.64% (91 samples) 1.09x ts-date 2,378,361 op/s ± 0.64% (92 samples) 3.78x Fastest is ts-date --------------------------------------------------------------- Difference in hours between two dates --------------------------------------------------------------- moment 656,953 op/s ± 0.51% (91 samples) 1.00x moment cached 1,125,201 op/s ± 1.17% (88 samples) 1.71x date-fns 3,650,063 op/s ± 0.33% (93 samples) 5.56x ts-date 50,489,703 op/s ± 0.51% (90 samples) 76.85x Fastest is ts-date --------------------------------------------------------------- Difference in years between two dates --------------------------------------------------------------- moment 93,108 op/s ± 1.08% (82 samples) 1.00x moment cached 106,790 op/s ± 1.18% (92 samples) 1.15x date-fns 794,059 op/s ± 0.49% (89 samples) 8.53x ts-date 7,509,694 op/s ± 0.63% (91 samples) 80.66x Fastest is ts-date --------------------------------------------------------------- Format by pattern "dddd, MMMM Do YYYY, [escaped], h:mm:ss a" --------------------------------------------------------------- moment 60,374 op/s ± 0.35% (88 samples) 1.00x moment cached 65,728 op/s ± 1.02% (90 samples) 1.09x date-fns 132,244 op/s ± 0.81% (93 samples) 2.19x ts-date 896,945 op/s ± 0.90% (87 samples) 14.86x Fastest is ts-date --------------------------------------------------------------- Format as ISO 8601 string --------------------------------------------------------------- moment 191,197 op/s ± 0.36% (92 samples) 1.00x moment cached 271,260 op/s ± 1.03% (91 samples) 1.42x date-fns 184,121 op/s ± 0.35% (95 samples) 0.96x ts-date 722,069 op/s ± 0.30% (90 samples) 3.78x Fastest is ts-date --------------------------------------------------------------- Parse from ISO 8601 string --------------------------------------------------------------- moment 45,104 op/s ± 1.25% (94 samples) 1.00x date-fns 430,012 op/s ± 0.36% (92 samples) 9.53x ts-date 977,591 op/s ± 0.70% (90 samples) 21.67x Fastest is ts-date --------------------------------------------------------------- ```