1 var usage = 'node benchmark/compare.js ' +
2 '<node-binary1> <node-binary2> ' +
3 '[--html] [--red|-r] [--green|-g]';
9 for (var i = 2; i < process.argv.length; i++) {
10 var arg = process.argv[i];
12 case '--red': case '-r':
13 show = show === 'green' ? 'both' : 'red';
15 case '--green': case '-g':
16 show = show === 'red' ? 'both' : 'green';
21 case '-h': case '-?': case '--help':
32 var green = '\033[1;32m';
33 var red = '\033[1;31m';
37 var start = '<pre style="background-color:#333;color:#eee">';
38 var green = '<span style="background-color:#0f0;color:#000">';
39 var red = '<span style="background-color:#f00;color:#fff">';
40 var reset = '</span>';
44 var runBench = process.env.NODE_BENCH || 'bench';
46 if (nodes.length !== 2)
47 return console.error('usage:\n %s', usage);
49 var spawn = require('child_process').spawn;
52 var r = (+process.env.NODE_BENCH_RUNS || 1) * 2;
58 toggle = ++toggle % 2;
60 var node = nodes[toggle];
61 console.error('running %s', node);
63 for (var i in process.env)
64 env[i] = process.env[i];
68 var child = spawn('make', [runBench], { env: env });
69 child.stdout.setEncoding('utf8');
70 child.stdout.on('data', function(c) {
74 child.stderr.pipe(process.stderr);
76 child.on('close', function(code) {
78 console.error('%s exited with code=%d', node, code);
81 out.trim().split(/\r?\n/).forEach(function(line) {
86 var s = line.split(':');
88 if (!num && num !== 0)
92 var res = results[line] = results[line] || {};
93 res[node] = res[node] || [];
103 // each result is an object with {"foo.js arg=bar":12345,...}
104 // compare each thing, and show which node did the best.
105 // node[0] is shown in green, node[1] shown in red.
106 var maxLen = -Infinity;
107 var util = require('util');
110 Object.keys(results).map(function(bench) {
111 var res = results[bench];
112 var n0 = avg(res[nodes[0]]);
113 var n1 = avg(res[nodes[1]]);
115 var pct = ((n0 - n1) / n1 * 100).toFixed(2);
117 var g = n0 > n1 ? green : '';
118 var r = n0 > n1 ? '' : red;
121 if (show === 'green' && !g || show === 'red' && !r)
124 var r0 = util.format('%s%s: %d%s', g, nodes[0], n0.toPrecision(5), g ? reset : '');
125 var r1 = util.format('%s%s: %d%s', r, nodes[1], n1.toPrecision(5), r ? reset : '');
126 var pct = c + pct + '%' + reset;
127 var l = util.format('%s: %s %s', bench, r0, r1);
128 maxLen = Math.max(l.length + pct.length, maxLen);
130 }).filter(function(l) {
132 }).forEach(function(line) {
135 var dotLen = maxLen - l.length - pct.length + 2;
136 var dots = ' ' + new Array(Math.max(0, dotLen)).join('.') + ' ';
137 console.log(l + dots + pct);
143 if (list.length >= 3) {
145 var q = Math.floor(list.length / 4) || 1;
146 list = list.slice(q, -q);
148 return list.reduce(function(a, b) {