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| Current File : //home/ubuntu/node-v16.18.1/benchmark/perf_hooks/bench-eventlooputil.js |
'use strict';
const common = require('../common.js');
const assert = require('assert').ok;
const { performance } = require('perf_hooks');
const { nodeTiming, eventLoopUtilization } = performance;
const bench = common.createBenchmark(main, {
n: [1e6],
method: [
'idleTime',
'ELU_simple',
'ELU_passed',
],
});
function main({ method, n }) {
switch (method) {
case 'idleTime':
benchIdleTime(n);
break;
case 'ELU_simple':
benchELUSimple(n);
break;
case 'ELU_passed':
benchELUPassed(n);
break;
default:
throw new Error(`Unsupported method ${method}`);
}
}
function benchIdleTime(n) {
bench.start();
for (let i = 0; i < n; i++)
nodeTiming.idleTime; // eslint-disable-line no-unused-expressions
bench.end(n);
}
function benchELUSimple(n) {
// Need to put this in setImmediate or will always return 0.
setImmediate(() => {
const elu = eventLoopUtilization();
assert(elu.active + elu.idle > 0);
bench.start();
for (let i = 0; i < n; i++)
eventLoopUtilization();
bench.end(n);
});
}
function benchELUPassed(n) {
// Need to put this in setImmediate or will always return 0.
setImmediate(() => {
let elu = eventLoopUtilization();
assert(elu.active + elu.idle > 0);
bench.start();
for (let i = 0; i < n; i++)
elu = eventLoopUtilization(elu);
bench.end(n);
});
}
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