72e65d6797
BREAKING CHANGE:
Before: constructor(@Inject(LifeCycle) lifecycle) { lifecycle.tick(); }
After: constructor(@Inject(ApplicationRef) appRef) { appRef.tick(); }
Closes #5008
71 lines
2.6 KiB
TypeScript
71 lines
2.6 KiB
TypeScript
import {ApplicationRef} from 'angular2/src/core/application_ref';
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import {ComponentRef, ComponentRef_} from 'angular2/src/core/linker/dynamic_component_loader';
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import {isPresent, NumberWrapper} from 'angular2/src/core/facade/lang';
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import {performance, window} from 'angular2/src/core/facade/browser';
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import {DOM} from 'angular2/src/core/dom/dom_adapter';
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/**
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* Entry point for all Angular debug tools. This object corresponds to the `ng`
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* global variable accessible in the dev console.
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*/
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export class AngularTools {
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profiler: AngularProfiler;
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constructor(ref: ComponentRef) { this.profiler = new AngularProfiler(ref); }
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}
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/**
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* Entry point for all Angular profiling-related debug tools. This object
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* corresponds to the `ng.profiler` in the dev console.
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*/
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export class AngularProfiler {
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appRef: ApplicationRef;
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constructor(ref: ComponentRef) {
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this.appRef = (<ComponentRef_>ref).injector.get(ApplicationRef);
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}
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/**
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* Exercises change detection in a loop and then prints the average amount of
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* time in milliseconds how long a single round of change detection takes for
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* the current state of the UI. It runs a minimum of 5 rounds for a minimum
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* of 500 milliseconds.
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*
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* Optionally, a user may pass a `config` parameter containing a map of
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* options. Supported options are:
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*
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* `record` (boolean) - causes the profiler to record a CPU profile while
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* it exercises the change detector. Example:
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*
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* ```
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* ng.profiler.timeChangeDetection({record: true})
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* ```
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*/
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timeChangeDetection(config: any) {
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var record = isPresent(config) && config['record'];
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var profileName = 'Change Detection';
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// Profiler is not available in Android browsers, nor in IE 9 without dev tools opened
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var isProfilerAvailable = isPresent(window.console.profile);
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if (record && isProfilerAvailable) {
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window.console.profile(profileName);
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}
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var start = DOM.performanceNow();
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var numTicks = 0;
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while (numTicks < 5 || (DOM.performanceNow() - start) < 500) {
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this.appRef.tick();
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numTicks++;
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}
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var end = DOM.performanceNow();
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if (record && isProfilerAvailable) {
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// need to cast to <any> because type checker thinks there's no argument
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// while in fact there is:
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//
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// https://developer.mozilla.org/en-US/docs/Web/API/Console/profileEnd
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(<any>window.console.profileEnd)(profileName);
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}
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var msPerTick = (end - start) / numTicks;
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window.console.log(`ran ${numTicks} change detection cycles`);
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window.console.log(`${NumberWrapper.toFixed(msPerTick, 2)} ms per check`);
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}
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}
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