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// If there are no args, then this is the root. Run all the benchmarks!
'use strict';
if (!process.argv[2])
parent();
else
runTest(+process.argv[2], +process.argv[3], process.argv[4]);
function parent() {
var types = [ 'string', 'buffer' ];
var durs = [ 1, 5 ];
var sizes = [ 1, 10, 100, 2048, 10240 ];
var queue = [];
types.forEach(function(t) {
durs.forEach(function(d) {
sizes.forEach(function(s) {
queue.push([__filename, d, s, t]);
});
});
});
var spawn = require('child_process').spawn;
var node = process.execPath;
run();
function run() {
var args = queue.shift();
if (!args)
return;
var child = spawn(node, args, { stdio: 'inherit' });
child.on('close', function(code, signal) {
if (code)
throw new Error('Benchmark failed: ' + args.slice(1));
run();
});
}
}
function runTest(dur, size, type) {
if (type !== 'string')
type = 'buffer';
var chunk;
switch (type) {
case 'string':
chunk = new Array(size + 1).join('a');
break;
case 'buffer':
chunk = Buffer.alloc(size, 'a');
break;
}
var fs = require('fs');
try { fs.unlinkSync('write_stream_throughput'); } catch (e) {}
var start;
var end;
function done() {
var time = end[0] + end[1] / 1E9;
var written = fs.statSync('write_stream_throughput').size / 1024;
var rate = (written / time).toFixed(2);
console.log('fs_write_stream_dur_%d_size_%d_type_%s: %d',
dur, size, type, rate);
try { fs.unlinkSync('write_stream_throughput'); } catch (e) {}
}
var f = require('fs').createWriteStream('write_stream_throughput');
f.on('drain', write);
f.on('open', write);
f.on('close', done);
// streams2 fs.WriteStreams will let you send a lot of writes into the
// buffer before returning false, so capture the *actual* end time when
// all the bytes have been written to the disk, indicated by 'finish'
f.on('finish', function() {
end = process.hrtime(start);
});
var ending = false;
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;
start = start || process.hrtime();
while (false !== f.write(chunk));
end = process.hrtime(start);
if (end[0] >= dur) {
ending = true;
f.end();
}
}
}
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