/* * Copyright (C) 2019-2020 Alex Yatskov <alex@foosoft.net> * Author: Alex Yatskov <alex@foosoft.net> * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <https://www.gnu.org/licenses/>. */ class Timer { constructor(name) { this.samples = []; this.parent = null; this.sample(name); const current = Timer._current; if (current !== null) { current.samples[current.samples.length - 1].children.push(this); this.parent = current; } Timer._current = this; } sample(name) { const time = window.performance.now(); this.samples.push({ name, time, children: [] }); } complete(skip) { this.sample('complete'); Timer._current = this.parent; if (this.parent === null) { if (!skip) { console.log(this.toString()); } } else { if (skip) { const sample = this.parent.samples[this.parent.samples.length - 1]; sample.children.splice(sample.children.length - 1, 1); } } } duration(sampleIndex) { const sampleIndexIsValid = (typeof sampleIndex === 'number'); const startIndex = (sampleIndexIsValid ? sampleIndex : 0); const endIndex = (sampleIndexIsValid ? sampleIndex + 1 : this.times.length - 1); return (this.times[endIndex].time - this.times[startIndex].time); } toString() { const indent = ' '; const name = this.samples[0].name; const duration = this.samples[this.samples.length - 1].time - this.samples[0].time; const extensionName = chrome.runtime.getManifest().name; return `${name} took ${duration.toFixed(8)}ms [${extensionName}]` + Timer._indentString(this.getSampleString(), indent); } getSampleString() { const indent = ' '; const duration = this.samples[this.samples.length - 1].time - this.samples[0].time; let message = ''; for (let i = 0, ii = this.samples.length - 1; i < ii; ++i) { const sample = this.samples[i]; const sampleDuration = this.samples[i + 1].time - sample.time; message += `\nSample[${i}] took ${sampleDuration.toFixed(8)}ms (${((sampleDuration / duration) * 100.0).toFixed(1)}%) [${sample.name}]`; for (const child of sample.children) { message += Timer._indentString(child.getSampleString(), indent); } } return message; } static _indentString(message, indent) { return message.replace(/\n/g, `\n${indent}`); } } Timer._current = null;