Performance - Performance - Web

Deno supports User Timing Level 3 which is not widely supported yet in other runtimes.

Check out the Performance API documentation on MDN for further information about how to use the API.

Methods



mark(markName: string,
options?: PerformanceMarkOptions,
): PerformanceMark

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



measure(measureName: string,
options?: PerformanceMeasureOptions,
): PerformanceMeasure

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

readonly



timeOrigin: number

Returns a timestamp representing the start of the performance measurement.



clearMarks(markName?: string): void

Removes the stored timestamp with the associated name.



clearMeasures(measureName?: string): void

Removes stored timestamp with the associated name.



getEntries(): PerformanceEntryList



getEntriesByName(name: string,
type?: string,
): PerformanceEntryList



getEntriesByType(type: string): PerformanceEntryList



mark(markName: string,
options?: PerformanceMarkOptions,
): PerformanceMark

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



measure(measureName: string,
options?: PerformanceMeasureOptions,
): PerformanceMeasure

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



measure(measureName: string,
startMark?: string,
endMark?: string,
): PerformanceMeasure

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



now(): number

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

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



toJSON(): any

Returns a JSON representation of the performance object.