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chore(perf): return perf metrics from AngularProfiler #8075

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chore(perf): return perf metrics from AngularProfiler #8075

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8 changes: 7 additions & 1 deletion modules/angular2/src/platform/browser/tools/common_tools.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,10 @@ import {isPresent, NumberWrapper} from 'angular2/src/facade/lang';
import {window} from 'angular2/src/facade/browser';
import {DOM} from 'angular2/src/platform/dom/dom_adapter';

export class ChangeDetectionPerfRecord {
constructor(public msPerTick: number, public numTicks: number) {}
}

/**
* Entry point for all Angular debug tools. This object corresponds to the `ng`
* global variable accessible in the dev console.
Expand Down Expand Up @@ -41,7 +45,7 @@ export class AngularProfiler {
* ng.profiler.timeChangeDetection({record: true})
* ```
*/
timeChangeDetection(config: any) {
timeChangeDetection(config: any): ChangeDetectionPerfRecord {
var record = isPresent(config) && config['record'];
var profileName = 'Change Detection';
// Profiler is not available in Android browsers, nor in IE 9 without dev tools opened
Expand All @@ -66,5 +70,7 @@ export class AngularProfiler {
var msPerTick = (end - start) / numTicks;
window.console.log(`ran ${numTicks} change detection cycles`);
window.console.log(`${NumberWrapper.toFixed(msPerTick, 2)} ms per check`);

return new ChangeDetectionPerfRecord(msPerTick, numTicks);
}
}
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