3 var colors = require('colors'),
5 _ = require('underscore'),
6 metrics = require('metrics'),
8 // `node diff_multi_bench_output.js before.txt after.txt`
9 before = process.argv[2],
10 after = process.argv[3];
12 if (!before || !after) {
13 console.log('Please supply two file arguments:');
15 n = n.substring(n.lastIndexOf('/', n.length));
16 console.log(' ./' + n + ' multiBenchBefore.txt multiBenchAfter.txt');
17 console.log('To generate multiBenchBefore.txt, run');
18 console.log(' node multi_bench.js > multiBenchBefore.txt');
19 console.log('Thank you for benchmarking responsibly.');
23 var before_lines = fs.readFileSync(before, 'utf8').split('\n'),
24 after_lines = fs.readFileSync(after, 'utf8').split('\n');
26 console.log('Comparing before,', before.green, '(', before_lines.length,
27 'lines)', 'to after,', after.green, '(', after_lines.length, 'lines)');
29 var total_ops = new metrics.Histogram.createUniformHistogram();
31 before_lines.forEach(function(b, i) {
32 var a = after_lines[i];
33 if (!a || !b || !b.trim() || !a.trim()) {
34 // console.log('#ignored#', '>'+a+'<', '>'+b+'<');
38 b_words = b.split(' ').filter(is_whitespace);
39 a_words = a.split(' ').filter(is_whitespace);
43 .map(function(words) {
44 // console.log(words);
45 return parseInt10(words.slice(-2, -1));
46 }).filter(function(num) {
47 var isNaN = !num && num !== 0;
50 if (ops.length != 2) return
52 var delta = ops[1] - ops[0];
54 total_ops.update(delta);
56 delta = humanize_diff(delta);
59 command_name(a_words) == command_name(b_words)
60 ? command_name(a_words) + ':'
63 ops.join(' -> '), 'ops/sec (∆', delta, ')');
66 console.log('Mean difference in ops/sec:', humanize_diff(total_ops.mean()));
68 function is_whitespace(s) {
72 function parseInt10(s) {
73 return parseInt(s, 10);
76 // green if greater than 0, red otherwise
77 function humanize_diff(num) {
79 return ('+' + num).green;
81 return ('' + num).red;
84 function command_name(words) {
85 var line = words.join(' ');
86 return line.substr(0, line.indexOf(','));