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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. | ||
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var path = require('path'); | ||
var filename = path.resolve(__dirname, 'http.sh'); | ||
var fs = require('fs'); | ||
var count = 0; | ||
var go = true; | ||
var len = -1; | ||
var assert = require('assert'); | ||
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var concurrency = 1; | ||
var encoding = null; | ||
var time = 10; | ||
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for (var i = 2; i < process.argv.length; i++) { | ||
var arg = process.argv[i]; | ||
if (arg.match(/^-e$/)) { | ||
encoding = process.argv[++i] || null; | ||
} else if (arg.match(/^-c$/)) { | ||
concurrency = ~~process.argv[++i]; | ||
if (concurrency < 1) concurrency = 1; | ||
} else if (arg === '-t') { | ||
time = ~~process.argv[++i]; | ||
if (time < 1) time = 1; | ||
} | ||
} | ||
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setTimeout(function() { | ||
go = false; | ||
}, time * 1000); | ||
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function round(n) { | ||
return Math.floor(n * 100) / 100; | ||
} | ||
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var start = process.hrtime(); | ||
while (concurrency--) readFile(); | ||
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function readFile() { | ||
if (!go) { | ||
process.stdout.write('\n'); | ||
console.log('read the file %d times (higher is better)', count); | ||
var end = process.hrtime(); | ||
var elapsed = [end[0] - start[0], end[1] - start[1]]; | ||
var ns = elapsed[0] * 1E9 + elapsed[1]; | ||
var nsper = round(ns / count); | ||
console.log('%d ns per read (lower is better)', nsper); | ||
var readsper = round(count / (ns / 1E9)); | ||
console.log('%d reads per sec (higher is better)', readsper); | ||
process.exit(0); | ||
return; | ||
} | ||
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if (!(count % 1000)) { | ||
process.stdout.write('.'); | ||
} | ||
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if (encoding) fs.readFile(filename, encoding, then); | ||
else fs.readFile(filename, then); | ||
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function then(er, data) { | ||
assert.ifError(er); | ||
count++; | ||
// basic sanity test: we should get the same number of bytes each time. | ||
if (count === 1) len = data.length; | ||
else assert(len === data.length); | ||
readFile(); | ||
} | ||
} |