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// test the throughput of the fs.WriteStream class.
'use strict';
var path = require('path');
var common = require('../common.js');
var filename = path.resolve(__dirname, '.removeme-benchmark-garbage');
var fs = require('fs');
var bench = common.createBenchmark(main, {
dur: [5],
type: ['buf', 'asc', 'utf'],
size: [2, 1024, 65535, 1024 * 1024]
});
function main(conf) {
var dur = +conf.dur;
var type = conf.type;
var size = +conf.size;
var encoding;
var chunk;
switch (type) {
case 'buf':
chunk = Buffer.alloc(size, 'b');
break;
case 'asc':
chunk = new Array(size + 1).join('a');
encoding = 'ascii';
break;
case 'utf':
chunk = new Array(Math.ceil(size / 2) + 1).join('ü');
encoding = 'utf8';
break;
default:
throw new Error('invalid type');
}
try { fs.unlinkSync(filename); } catch (e) {}
var started = false;
var ending = false;
var ended = false;
setTimeout(function() {
ending = true;
f.end();
}, dur * 1000);
var f = fs.createWriteStream(filename);
f.on('drain', write);
f.on('open', write);
f.on('close', done);
f.on('finish', function() {
ended = true;
var written = fs.statSync(filename).size / 1024;
try { fs.unlinkSync(filename); } catch (e) {}
bench.end(written / 1024);
});
function write() {
// don't try to write after we end, even if a 'drain' event comes.
// v0.8 streams are so sloppy!
if (ending)
return;
if (!started) {
started = true;
bench.start();
}
while (false !== f.write(chunk, encoding));
}
function done() {
if (!ended)
f.emit('finish');
}
}
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