Performance

Deno supports user timing Level 3 (see: https://w3c.github.io/user-timing) which is not widely supported yet in other runtimes. These types are here so that these features are still available when using the Deno namespace in conjunction with other type libs, like dom.

interface Performance {
mark(markName: string, options?: PerformanceMarkOptions): PerformanceMark;
measure(measureName: string, options?: PerformanceMeasureOptions): PerformanceMeasure;
}
class Performance {
constructor();
clearMarks(markName?: string): void;
clearMeasures(measureName?: string): void;
getEntries(): PerformanceEntryList;
getEntriesByName(name: string, type?: string): PerformanceEntryList;
getEntriesByType(type: string): PerformanceEntryList;
mark(markName: string, options?: PerformanceMarkOptions): PerformanceMark;
measure(measureName: string, options?: PerformanceMeasureOptions): PerformanceMeasure;
measure(
measureName: string,
startMark?: string,
endMark?: string,
): PerformanceMeasure;
now(): number;
}

§Methods

§
mark(markName: string, options?: PerformanceMarkOptions): PerformanceMark
[src]

Stores a timestamp with the associated name (a "mark").

§
measure(measureName: string, options?: PerformanceMeasureOptions): PerformanceMeasure
[src]

Stores the DOMHighResTimeStamp duration between two marks along with the associated name (a "measure").

§Constructors

§
new Performance()
[src]

§Methods

§
clearMarks(markName?: string): void
[src]

Removes the stored timestamp with the associated name.

§
clearMeasures(measureName?: string): void
[src]

Removes stored timestamp with the associated name.

§
getEntriesByName(name: string, type?: string): PerformanceEntryList
[src]
§
getEntriesByType(type: string): PerformanceEntryList
[src]
§
mark(markName: string, options?: PerformanceMarkOptions): PerformanceMark
[src]

Stores a timestamp with the associated name (a "mark").

§
measure(measureName: string, options?: PerformanceMeasureOptions): PerformanceMeasure
[src]

Stores the DOMHighResTimeStamp duration between two marks along with the associated name (a "measure").

measure(measureName: string, startMark?: string, endMark?: string): PerformanceMeasure
[src]

Stores the DOMHighResTimeStamp duration between two marks along with the associated name (a "measure").

§
now(): number
[src]

Returns a current time from Deno's start in milliseconds.

Use the permission flag --allow-hrtime return a precise value.

const t = performance.now();
console.log(`${t} ms since start!`);