1'use strict'; 2 3const common = require('../common.js'); 4 5const { 6 PerformanceObserver, 7 performance, 8} = require('perf_hooks'); 9 10const bench = common.createBenchmark(main, { 11 n: [1e5], 12 observe: ['all', 'measure'], 13}); 14 15function test() { 16 performance.mark('a'); 17 performance.mark('b'); 18 performance.measure('a to b', 'a', 'b'); 19} 20 21function main({ n, observe }) { 22 const entryTypes = observe === 'all' ? 23 [ 'mark', 'measure' ] : 24 [ observe ]; 25 const obs = new PerformanceObserver(() => { 26 bench.end(n); 27 }); 28 obs.observe({ entryTypes, buffered: true }); 29 30 bench.start(); 31 performance.mark('start'); 32 for (let i = 0; i < 1e5; i++) 33 test(); 34} 35