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// Submit a mix of short and long jobs to the threadpool.
// Report total job throughput.
// If we partition the long job, overall job throughput goes up significantly.
// However, this comes at the cost of the long job throughput.
//
// Short jobs: small zip jobs.
// Long jobs: fs.readFile on a large file.
'use strict';
const path = require('path');
const common = require('../common.js');
const filename = path.resolve(__dirname,
`.removeme-benchmark-garbage-${process.pid}`);
const fs = require('fs');
const zlib = require('zlib');
const assert = require('assert');
const bench = common.createBenchmark(main, {
dur: [5],
len: [1024, 16 * 1024 * 1024],
concurrent: [1, 10]
});
function main(conf) {
const len = +conf.len;
try { fs.unlinkSync(filename); } catch {}
var data = Buffer.alloc(len, 'x');
fs.writeFileSync(filename, data);
data = null;
const zipData = Buffer.alloc(1024, 'a');
var reads = 0;
var zips = 0;
var benchEnded = false;
bench.start();
setTimeout(() => {
const totalOps = reads + zips;
benchEnded = true;
bench.end(totalOps);
try { fs.unlinkSync(filename); } catch {}
}, +conf.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();
}
function zip() {
zlib.deflate(zipData, afterZip);
}
function afterZip(er, data) {
if (er)
throw er;
zips++;
if (!benchEnded)
zip();
}
// Start reads
var cur = +conf.concurrent;
while (cur--) read();
// Start a competing zip
zip();
}