1 var usage = 'node benchmark/compare.js <node-binary1> <node-binary2> [--html] [--red|-r] [--green|-g]';
7 for (var i = 2; i < process.argv.length; i++) {
8 var arg = process.argv[i];
10 case '--red': case '-r':
11 show = show === 'green' ? 'both' : 'red';
13 case '--green': case '-g':
14 show = show === 'red' ? 'both' : 'green';
19 case '-h': case '-?': case '--help':
30 var green = '\033[1;32m';
31 var red = '\033[1;31m';
35 var start = '<pre style="background-color:#333;color:#eee">';
36 var green = '<span style="background-color:#0f0;color:#000">';
37 var red = '<span style="background-color:#f00">';
38 var reset = '</span>';
42 var runBench = process.env.NODE_BENCH || 'bench';
44 if (nodes.length !== 2)
45 return console.error('usage:\n %s', usage);
47 var spawn = require('child_process').spawn;
60 console.error('running %s', node);
62 for (var i in process.env)
63 env[i] = process.env[i];
65 var child = spawn('make', [ runBench ], { env: env });
68 child.stdout.setEncoding('utf8');
69 child.stdout.on('data', function(c) {
73 child.stderr.pipe(process.stderr);
75 child.on('close', function(code) {
77 console.error('%s exited with code=%d', node, code);
80 out.trim().split(/\r?\n/).forEach(function(line) {
85 var s = line.split(':');
87 if (!num && num !== 0)
91 var res = results[line] = results[line] || {};
101 // each result is an object with {"foo.js arg=bar":12345,...}
102 // compare each thing, and show which node did the best.
103 // node[0] is shown in green, node[1] shown in red.
104 var maxLen = -Infinity;
105 var util = require('util');
108 Object.keys(results).map(function(bench) {
109 var res = results[bench];
110 var n0 = res[nodes[0]];
111 var n1 = res[nodes[1]];
113 var pct = ((n0 - n1) / ((n0 + n1) / 2) * 100).toFixed(2);
115 var g = n0 > n1 ? green : '';
116 var r = n0 > n1 ? '' : red;
119 if (show === 'green' && !g || show === 'red' && !r)
122 var r0 = util.format('%s%s: %d%s', g, nodes[0], n0, reset);
123 var r1 = util.format('%s%s: %d%s', r, nodes[1], n1, reset);
124 var pct = c + pct + '%' + reset;
125 var l = util.format('%s: %s %s', bench, r0, r1);
126 maxLen = Math.max(l.length + pct.length, maxLen);
128 }).filter(function(l) {
130 }).forEach(function(line) {
133 var dotLen = maxLen - l.length - pct.length + 2;
134 var dots = ' ' + new Array(Math.max(0, dotLen)).join('.') + ' ';
135 console.log(l + dots + pct);