mirror of https://github.com/lukechilds/node.git
isaacs
13 years ago
1 changed files with 72 additions and 0 deletions
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// Call fs.readFile over and over again really fast.
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// Then see how many times it got called.
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// Yes, this is a silly benchmark. Most benchmarks are silly.
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var path = require('path'); |
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var filename = path.resolve(__dirname, 'http.sh'); |
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var fs = require('fs'); |
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var count = 0; |
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var go = true; |
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var len = -1; |
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var assert = require('assert'); |
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var concurrency = 1; |
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var encoding = null; |
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var time = 10; |
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for (var i = 2; i < process.argv.length; i++) { |
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var arg = process.argv[i]; |
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if (arg.match(/^-e$/)) { |
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encoding = process.argv[++i] || null; |
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} else if (arg.match(/^-c$/)) { |
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concurrency = ~~process.argv[++i]; |
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if (concurrency < 1) concurrency = 1; |
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} else if (arg === '-t') { |
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time = ~~process.argv[++i]; |
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if (time < 1) time = 1; |
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} |
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} |
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setTimeout(function() { |
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go = false; |
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}, time * 1000); |
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function round(n) { |
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return Math.floor(n * 100) / 100; |
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} |
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var start = process.hrtime(); |
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while (concurrency--) readFile(); |
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function readFile() { |
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if (!go) { |
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process.stdout.write('\n'); |
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console.log('read the file %d times (higher is better)', count); |
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var end = process.hrtime(); |
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var elapsed = [end[0] - start[0], end[1] - start[1]]; |
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var ns = elapsed[0] * 1E9 + elapsed[1]; |
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var nsper = round(ns / count); |
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console.log('%d ns per read (lower is better)', nsper); |
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var readsper = round(count / (ns / 1E9)); |
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console.log('%d reads per sec (higher is better)', readsper); |
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process.exit(0); |
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return; |
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} |
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if (!(count % 1000)) { |
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process.stdout.write('.'); |
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} |
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if (encoding) fs.readFile(filename, encoding, then); |
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else fs.readFile(filename, then); |
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function then(er, data) { |
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assert.ifError(er); |
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count++; |
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// basic sanity test: we should get the same number of bytes each time.
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if (count === 1) len = data.length; |
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else assert(len === data.length); |
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readFile(); |
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} |
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} |
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