@uifabric/utilities/lib-commonjs/FabricPerformance.js

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var now = function () {
    return typeof performance !== 'undefined' && !!performance.now ? performance.now() : Date.now();
};
var RESET_INTERVAL = 3 * 60 * 1000; // auto reset every 3 minutes
/**
 * Performance helper class for measuring things.
 *
 * @public
 * {@docCategory FabricPerformance}
 */
var FabricPerformance = /** @class */ (function () {
    function FabricPerformance() {
    }
    /**
     * Measures execution time of the given syncronous function. If the same logic is executed multiple times,
     * each individual measurement will be collected as well the overall numbers.
     * @param name - The name of this measurement
     * @param func - The logic to be measured for execution time
     */
    FabricPerformance.measure = function (name, func) {
        if (FabricPerformance._timeoutId) {
            FabricPerformance.setPeriodicReset();
        }
        var start = now();
        func();
        var end = now();
        var measurement = FabricPerformance.summary[name] || {
            totalDuration: 0,
            count: 0,
            all: [],
        };
        var duration = end - start;
        measurement.totalDuration += duration;
        measurement.count++;
        measurement.all.push({
            duration: duration,
            timeStamp: end,
        });
        FabricPerformance.summary[name] = measurement;
    };
    FabricPerformance.reset = function () {
        FabricPerformance.summary = {};
        clearTimeout(FabricPerformance._timeoutId);
        FabricPerformance._timeoutId = NaN;
    };
    FabricPerformance.setPeriodicReset = function () {
        FabricPerformance._timeoutId = setTimeout(function () { return FabricPerformance.reset(); }, RESET_INTERVAL);
    };
    FabricPerformance.summary = {};
    return FabricPerformance;
}());
exports.FabricPerformance = FabricPerformance;
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