63 lines
2.0 KiB
JavaScript
63 lines
2.0 KiB
JavaScript
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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const perf_hooks_1 = require("perf_hooks");
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function createPerformance() {
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let enabled = false;
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let timeOrigin;
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let marks;
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let measurements;
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function enable() {
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enabled = true;
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marks = new Map();
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measurements = new Map();
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timeOrigin = perf_hooks_1.performance.now();
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}
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function disable() {
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enabled = false;
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}
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function mark(name) {
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if (enabled) {
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marks.set(name, perf_hooks_1.performance.now());
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}
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}
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function measure(name, startMark, endMark) {
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if (enabled) {
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const start = (startMark && marks.get(startMark)) || timeOrigin;
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const end = (endMark && marks.get(endMark)) || perf_hooks_1.performance.now();
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measurements.set(name, (measurements.get(name) || 0) + (end - start));
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}
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}
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function markStart(name) {
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if (enabled) {
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mark(`${name} start`);
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}
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}
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function markEnd(name) {
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if (enabled) {
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mark(`${name} end`);
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measure(name, `${name} start`, `${name} end`);
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}
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}
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function formatName(name, width = 0) {
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return `${name}:`.padEnd(width);
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}
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function formatDuration(duration, width = 0) {
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return `${(duration / 1000).toFixed(2)} s`.padStart(width);
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}
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function print() {
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if (enabled) {
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let nameWidth = 0;
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let durationWidth = 0;
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measurements.forEach((duration, name) => {
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nameWidth = Math.max(nameWidth, formatName(name).length);
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durationWidth = Math.max(durationWidth, formatDuration(duration).length);
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});
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measurements.forEach((duration, name) => {
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console.log(`${formatName(name, nameWidth)} ${formatDuration(duration, durationWidth)}`);
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});
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}
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}
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return { enable, disable, mark, markStart, markEnd, measure, print };
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}
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exports.createPerformance = createPerformance;
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