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e5200392a2
use the perf_hooks to trace the time spent by net.connect, dns.lookup, dns.lookupService, dns.resolvexxx. PR-URL: https://github.com/nodejs/node/pull/42390 Reviewed-By: Matteo Collina <matteo.collina@gmail.com> Reviewed-By: Paolo Insogna <paolo@cowtech.it> Reviewed-By: Mohammed Keyvanzadeh <mohammadkeyvanzade94@gmail.com>
27 lines
745 B
JavaScript
27 lines
745 B
JavaScript
'use strict';
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const common = require('../common');
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const assert = require('assert');
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const dns = require('dns');
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const { PerformanceObserver } = require('perf_hooks');
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const entries = [];
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const obs = new PerformanceObserver(common.mustCallAtLeast((items) => {
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entries.push(...items.getEntries());
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}));
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obs.observe({ type: 'dns' });
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dns.lookup('localhost', () => {});
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process.on('exit', () => {
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assert.strictEqual(entries.length, 1);
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entries.forEach((entry) => {
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assert.strictEqual(!!entry.name, true);
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assert.strictEqual(entry.entryType, 'dns');
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assert.strictEqual(typeof entry.startTime, 'number');
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assert.strictEqual(typeof entry.duration, 'number');
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assert.strictEqual(typeof entry.detail, 'object');
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});
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});
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