mirror of https://github.com/nodejs/node.git
58 lines
1.3 KiB
JavaScript
58 lines
1.3 KiB
JavaScript
'use strict';
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const common = require('../common');
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const fs = require('fs');
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const tmpdir = require('../../test/common/tmpdir');
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tmpdir.refresh();
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const bufferSize = 1024;
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const sectorSize = 512;
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const bench = common.createBenchmark(main, {
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type: ['existing', 'non-existing'],
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n: [1e4],
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});
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function main({ n, type }) {
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let fd;
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const tmpfile = { name: tmpdir.resolve(`.existing-file-${process.pid}`),
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len: bufferSize * n };
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tmpfile.contents = Buffer.allocUnsafe(tmpfile.len);
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for (let offset = 0; offset < tmpfile.len; offset += sectorSize) {
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const fillByte = 256 * Math.random();
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const nBytesToFill = Math.min(sectorSize, tmpfile.len - offset);
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tmpfile.contents.fill(fillByte, offset, offset + nBytesToFill);
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}
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fs.writeFileSync(tmpfile.name, tmpfile.contents);
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switch (type) {
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case 'existing':
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fd = fs.openSync(tmpfile.name, 'r', 0o666);
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break;
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case 'non-existing':
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fd = 1 << 30;
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break;
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default:
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new Error('Invalid type');
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}
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const buffer = Buffer.alloc(bufferSize);
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bench.start();
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for (let i = 0; i < n; i++) {
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try {
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fs.readSync(fd, buffer);
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} catch {
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// Continue regardless of error.
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}
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}
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bench.end(n);
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if (type === 'existing') fs.closeSync(fd);
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}
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