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// Call fs.readFile over and over again really fast.
// Then see how many times it got called.
// Yes, this is a silly benchmark. Most benchmarks are silly.
'use strict';
const path = require('path');
const common = require('../common.js');
const filename = path.resolve(process.env.NODE_TMPDIR || __dirname,
`.removeme-benchmark-garbage-${process.pid}`);
const fs = require('fs');
const assert = require('assert');
const bench = common.createBenchmark(main, {
dur: [5],
len: [1024, 16 * 1024 * 1024],
concurrent: [1, 10]
});
function main({ len, dur, concurrent }) {
try { fs.unlinkSync(filename); } catch {}
var data = Buffer.alloc(len, 'x');
fs.writeFileSync(filename, data);
data = null;
var reads = 0;
var benchEnded = false;
bench.start();
setTimeout(() => {
benchEnded = true;
bench.end(reads);
try { fs.unlinkSync(filename); } catch {}
process.exit(0);
}, dur * 1000);
function read() {
fs.readFile(filename, afterRead);
}
function afterRead(er, data) {
if (er) {
if (er.code === 'ENOENT') {
// Only OK if unlinked by the timer from main.
assert.ok(benchEnded);
return;
}
throw er;
}
if (data.length !== len)
throw new Error('wrong number of bytes returned');
reads++;
if (!benchEnded)
read();
}
while (concurrent--) read();
}
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