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benchmark: add benchmark for dns.promises.lookup()
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Adding this benchmark will let us check the performance implications of
#27081.

PR-URL: #27249
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Yongsheng Zhang <zyszys98@gmail.com>
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Trott committed Apr 18, 2019
1 parent 2948e96 commit f98679f
Showing 1 changed file with 31 additions and 0 deletions.
31 changes: 31 additions & 0 deletions benchmark/dns/lookup-promises.js
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'use strict';

const common = require('../common.js');
const { lookup } = require('dns').promises;

const bench = common.createBenchmark(main, {
name: ['127.0.0.1', '::1'],
all: ['true', 'false'],
n: [5e6]
});

function main({ name, n, all }) {
if (all === 'true') {
const opts = { all: true };
bench.start();
(async function cb() {
for (let i = 0; i < n; i++) {
await lookup(name, opts);
}
})();
bench.end(n);
} else {
bench.start();
(async function cb() {
for (let i = 0; i < n; i++) {
await lookup(name);
}
})();
bench.end(n);
}
}

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