mirror of https://github.com/flutter/samples.git
deploy: a858f4701e
kevmoo
8 months ago
parent
b46421bf65
commit
b5ec0c2980
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"DQEHMnBhY2thZ2VzL2N1cGVydGlub19pY29ucy9hc3NldHMvQ3VwZXJ0aW5vSWNvbnMudHRmDAENAQcFYXNzZXQHMnBhY2thZ2VzL2N1cGVydGlub19pY29ucy9hc3NldHMvQ3VwZXJ0aW5vSWNvbnMudHRm"
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{"packages/cupertino_icons/assets/CupertinoIcons.ttf":["packages/cupertino_icons/assets/CupertinoIcons.ttf"],"packages/web_startup_analyzer/lib/web_startup_analyzer.js":["packages/web_startup_analyzer/lib/web_startup_analyzer.js"]}
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{"packages/cupertino_icons/assets/CupertinoIcons.ttf":["packages/cupertino_icons/assets/CupertinoIcons.ttf"]}
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// Copyright 2021 The Flutter team. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Helper class to capture Flutter web app startup timing information
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class FlutterWebStartupAnalyzer {
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timings;
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constructor() {
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this.timings = {};
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}
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markStart(name) {
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this.timings[name] = null;
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performance.mark('flt-' + name + '-started');
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}
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markFinished(name) {
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performance.mark('flt-' + name + '-finished');
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}
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capture(name) {
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var timingName = 'flt-' + name;
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var started = 'flt-' + name + 'started';
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try {
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var measurement = performance.measure('flt-' + name, 'flt-' + name + '-started', 'flt-' + name + '-finished');
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} catch(e) {
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// ignore errors if the mark doesn't exist
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return;
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}
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this.timings[name] = measurement.duration;
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}
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captureAll() {
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for (var [key, value] of Object.entries(this.timings)) {
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this.capture(key);
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}
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// Capture
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this.timings['load'] = performance.timing.loadEventEnd - performance.timing.domContentLoadedEventEnd;
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this.timings['domContentLoaded'] = performance.timing.domContentLoadedEventEnd - performance.timing.navigationStart;
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}
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capturePaint() {
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const entries = performance.getEntriesByType("paint");
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// Collect first-paint and first-contentful-paint entries
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entries.forEach((entry) => {
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this.timings[entry.name] = entry.startTime;
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});
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}
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}
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