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benchmark: add bench for zlib gzip + gunzip cycle
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Originally wrote this for some work that is going to take a while
longer before it’s ready to be PR’ed, so it seems fine to start
with this on its own.

PR-URL: #20034
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
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addaleax authored and MylesBorins committed May 4, 2018
1 parent 31812ed commit b0e6f10
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Showing 2 changed files with 46 additions and 2 deletions.
39 changes: 39 additions & 0 deletions benchmark/zlib/pipe.js
Original file line number Diff line number Diff line change
@@ -0,0 +1,39 @@
'use strict';
const common = require('../common.js');
const fs = require('fs');
const zlib = require('zlib');

const bench = common.createBenchmark(main, {
inputLen: [1024],
duration: [5],
type: ['string', 'buffer']
});

function main({ inputLen, duration, type }) {
const buffer = Buffer.alloc(inputLen, fs.readFileSync(__filename));
const chunk = type === 'buffer' ? buffer : buffer.toString('utf8');

const input = zlib.createGzip();
const output = zlib.createGunzip();

let readFromOutput = 0;
input.pipe(output);
if (type === 'string')
output.setEncoding('utf8');
output.on('data', (chunk) => readFromOutput += chunk.length);

function write() {
input.write(chunk, write);
}

bench.start();
write();

setTimeout(() => {
// Give result in GBit/s, like the net benchmarks do
bench.end(readFromOutput * 8 / (1024 ** 3));

// Cut off writing the easy way.
input.write = () => {};
}, duration * 1000);
}
9 changes: 7 additions & 2 deletions test/parallel/test-benchmark-zlib.js
Original file line number Diff line number Diff line change
Expand Up @@ -9,5 +9,10 @@ runBenchmark('zlib',
'method=deflate',
'n=1',
'options=true',
'type=Deflate'
]);
'type=Deflate',
'inputLen=1024',
'duration=0.001'
],
{
'NODEJS_BENCHMARK_ZERO_ALLOWED': 1
});

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