opendev/gerrit
Code Issues Proposed changes

Report low FPS to analytics

Browse Source 
Change-Id: I43e90294b16b48f717cfa7eaca18fec7c0bb488d
This commit is contained in:
Viktar Donich
2018-04-25 11:23:24 -07:00
parent 7f25f0fa16
commit f0f3b29142
6 changed files with 160 additions and 0 deletions
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61
polygerrit-ui/app/elements/core/gr-reporting/gr-jank-detector.js Normal file
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@@ -0,0 +1,61 @@
/**
* @license
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
(function() {
'use strict';
const JANK_SLEEP_TIME_MS = 1000;
const GrJankDetector = {
// Slowdowns counter.
jank: 0,
fps: 0,
_lastFrameTime: 0,
start() {
this._requestAnimationFrame(this._detect.bind(this));
},
_requestAnimationFrame(callback) {
window.requestAnimationFrame(callback);
},
_detect(now) {
if (this._lastFrameTime === 0) {
this._lastFrameTime = now;
this.fps = 0;
this._requestAnimationFrame(this._detect.bind(this));
return;
}
const fpsNow = 1000/(now - this._lastFrameTime);
this._lastFrameTime = now;
// Calculate moving average within last 3 measurements.
this.fps = this.fps === 0 ? fpsNow : ((this.fps * 2 + fpsNow) / 3);
if (this.fps > 10) {
this._requestAnimationFrame(this._detect.bind(this));
} else {
this.jank++;
console.warn('JANK', this.jank);
this._lastFrameTime = 0;
window.setTimeout(
() => this._requestAnimationFrame(this._detect.bind(this)),
JANK_SLEEP_TIME_MS);
}
},
};
window.GrJankDetector = GrJankDetector;
})();

78
polygerrit-ui/app/elements/core/gr-reporting/gr-jank-detector_test.html Normal file
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@@ -0,0 +1,78 @@
<!DOCTYPE html>
<!--
@license
Copyright (C) 2018 The Android Open Source Project
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->
<meta name="viewport" content="width=device-width, minimum-scale=1.0, initial-scale=1.0, user-scalable=yes">
<title>gr-jank-detector</title>
<script src="../../../bower_components/webcomponentsjs/webcomponents-lite.min.js"></script>
<script src="../../../bower_components/web-component-tester/browser.js"></script>
<link rel="import" href="../../../test/common-test-setup.html"/>
<script src="gr-jank-detector.js"></script>
<script>
suite('gr-jank-detector tests', () => {
let sandbox;
let clock;
let instance;
const NOW_TIME = 100;
setup(() => {
sandbox = sinon.sandbox.create();
clock = sinon.useFakeTimers(NOW_TIME);
instance = GrJankDetector;
instance._lastFrameTime = 0;
sandbox.stub(instance, '_requestAnimationFrame');
});
teardown(() => {
sandbox.restore();
});
test('start() installs frame callback', () => {
sandbox.stub(instance, '_detect');
instance._requestAnimationFrame.callsArg(0);
instance.start();
assert.isTrue(instance._detect.calledOnce);
});
test('measures fps', () => {
instance._detect(10);
instance._detect(30);
assert.equal(instance.fps, 50);
});
test('detects jank', () => {
let now = 10;
instance._detect(now);
const fastFrame = () => instance._detect(now += 20);
const slowFrame = () => instance._detect(now += 300);
fastFrame();
assert.equal(instance.jank, 0);
_.times(4, slowFrame);
assert.equal(instance.jank, 0);
instance._requestAnimationFrame.reset();
slowFrame();
assert.equal(instance.jank, 1);
assert.isFalse(instance._requestAnimationFrame.called);
clock.tick(1000);
assert.isTrue(instance._requestAnimationFrame.called);
});
});
</script>

1
polygerrit-ui/app/elements/core/gr-reporting/gr-reporting.html
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@@ -19,5 +19,6 @@ limitations under the License.
<link rel="import" href="../../shared/gr-js-api-interface/gr-js-api-interface.html">
<dom-module id="gr-reporting">
<script src="gr-jank-detector.js"></script>
<script src="gr-reporting.js"></script>
</dom-module>

15
polygerrit-ui/app/elements/core/gr-reporting/gr-reporting.js
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@@ -48,6 +48,14 @@
STARTED_HIDDEN: 'hidden',
};
// Frame rate related constants.
const JANK = {
TYPE: 'lifecycle',
CATEGORY: 'UI Latency',
// Reported events - alphabetize below.
COUNT: 'Jank count',
};
// Navigation reporting constants.
const NAVIGATION = {
TYPE: 'nav-report',
@@ -118,6 +126,8 @@
};
catchErrors();
GrJankDetector.start();
const GrReporting = Polymer({
is: 'gr-reporting',
@@ -206,6 +216,11 @@
},
beforeLocationChanged() {
if (GrJankDetector.jank > 0) {
this.reporter(
JANK.TYPE, JANK.CATEGORY, JANK.COUNT, GrJankDetector.jank);
GrJankDetector.jank = 0;
}
for (const prop of Object.keys(this._baselines)) {
delete this._baselines[prop];
}

4
polygerrit-ui/app/elements/core/gr-reporting/gr-reporting_test.html
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@@ -93,7 +93,11 @@ limitations under the License.
test('beforeLocationChanged', () => {
element._baselines['garbage'] = 'monster';
sandbox.stub(element, 'time');
GrJankDetector.jank = 42;
element.beforeLocationChanged();
assert.equal(GrJankDetector.jank, 0);
assert.isTrue(element.reporter.calledWithExactly(
'lifecycle', 'UI Latency', 'Jank count', 42));
assert.isTrue(element.time.calledWithExactly('DashboardDisplayed'));
assert.isTrue(element.time.calledWithExactly('ChangeDisplayed'));
assert.isTrue(element.time.calledWithExactly('DiffViewDisplayed'));

1
polygerrit-ui/app/test/index.html
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@@ -88,6 +88,7 @@ limitations under the License.
'core/gr-error-manager/gr-error-manager_test.html',
'core/gr-main-header/gr-main-header_test.html',
'core/gr-navigation/gr-navigation_test.html',
'core/gr-reporting/gr-jank-detector_test.html',
'core/gr-reporting/gr-reporting_test.html',
'core/gr-router/gr-router_test.html',
'core/gr-search-bar/gr-search-bar_test.html',