method Performance.timerify
Usage in Deno
import { type Performance } from "node:perf_hooks";
Performance.timerify<T extends (...params: any[]) => any>(fn: T,options?: TimerifyOptions,): T
This property is an extension by Node.js. It is not available in Web browsers.
Wraps a function within a new function that measures the running time of the wrapped function.
A PerformanceObserver must be subscribed to the 'function' event type in order for the timing details to be accessed.
import {
performance,
PerformanceObserver,
} from 'node:perf_hooks';
function someFunction() {
console.log('hello world');
}
const wrapped = performance.timerify(someFunction);
const obs = new PerformanceObserver((list) => {
console.log(list.getEntries()[0].duration);
performance.clearMarks();
performance.clearMeasures();
obs.disconnect();
});
obs.observe({ entryTypes: ['function'] });
// A performance timeline entry will be created
wrapped();
If the wrapped function returns a promise, a finally handler will be attached to the promise and the duration will be reported once the finally handler is invoked.
fn: T
optional
options: TimerifyOptions