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- #!/usr/bin/env node
- var colors = require('colors'),
- fs = require('fs'),
- _ = require('underscore'),
- metrics = require('metrics'),
- // `node diff_multi_bench_output.js before.txt after.txt`
- before = process.argv[2],
- after = process.argv[3];
- if (!before || !after) {
- console.log('Please supply two file arguments:');
- var n = __filename;
- n = n.substring(n.lastIndexOf('/', n.length));
- console.log(' ./' + n + ' multiBenchBefore.txt multiBenchAfter.txt');
- console.log('To generate multiBenchBefore.txt, run');
- console.log(' node multi_bench.js > multiBenchBefore.txt');
- console.log('Thank you for benchmarking responsibly.');
- return;
- }
- var before_lines = fs.readFileSync(before, 'utf8').split('\n'),
- after_lines = fs.readFileSync(after, 'utf8').split('\n');
- console.log('Comparing before,', before.green, '(', before_lines.length,
- 'lines)', 'to after,', after.green, '(', after_lines.length, 'lines)');
- var total_ops = new metrics.Histogram.createUniformHistogram();
- before_lines.forEach(function(b, i) {
- var a = after_lines[i];
- if (!a || !b || !b.trim() || !a.trim()) {
- // console.log('#ignored#', '>'+a+'<', '>'+b+'<');
- return;
- }
- b_words = b.split(' ').filter(is_whitespace);
- a_words = a.split(' ').filter(is_whitespace);
- var ops =
- [b_words, a_words]
- .map(function(words) {
- // console.log(words);
- return parseInt10(words.slice(-2, -1));
- }).filter(function(num) {
- var isNaN = !num && num !== 0;
- return !isNaN;
- });
- if (ops.length != 2) return
- var delta = ops[1] - ops[0];
- total_ops.update(delta);
- delta = humanize_diff(delta);
- console.log(
- // name of test
- command_name(a_words) == command_name(b_words)
- ? command_name(a_words) + ':'
- : '404:',
- // results of test
- ops.join(' -> '), 'ops/sec (∆', delta, ')');
- });
- console.log('Mean difference in ops/sec:', humanize_diff(total_ops.mean()));
- function is_whitespace(s) {
- return !!s.trim();
- }
- function parseInt10(s) {
- return parseInt(s, 10);
- }
- // green if greater than 0, red otherwise
- function humanize_diff(num) {
- if (num > 0) {
- return ('+' + num).green;
- }
- return ('' + num).red;
- }
- function command_name(words) {
- var line = words.join(' ');
- return line.substr(0, line.indexOf(','));
- }
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