bench: improve url parser benchmark

benchmark/url.js

@@ -1,22 +1,41 @@
-var url = require('url'),
-    urls = [
-      'http://nodejs.org/docs/latest/api/url.html#url_url_format_urlobj',
-      'http://blog.nodejs.org/',
-      'https://encrypted.google.com/search?q=url&q=site:npmjs.org&hl=en',
-      'javascript:alert("node is awesome");',
-      'some.ran/dom/url.thing?oh=yes#whoo'
-    ],
-    paths = [
-      '../foo/bar?baz=boom',
-      'foo/bar',
-      'http://nodejs.org',
-      './foo/bar?baz'
-    ];
-
-urls.forEach(url.parse);
-urls.forEach(url.format);
-urls.forEach(function(u){
-  paths.forEach(function(p){
-    url.resolve(u, p);
-  });
-});
+var util = require('util');
+var url = require('url')
+
+var urls = [
+  'http://nodejs.org/docs/latest/api/url.html#url_url_format_urlobj',
+  'http://blog.nodejs.org/',
+  'https://encrypted.google.com/search?q=url&q=site:npmjs.org&hl=en',
+  'javascript:alert("node is awesome");',
+  'some.ran/dom/url.thing?oh=yes#whoo'
+];
+
+var paths = [
+  '../foo/bar?baz=boom',
+  'foo/bar',
+  'http://nodejs.org',
+  './foo/bar?baz'
+];
+
+benchmark('parse()', url.parse);
+benchmark('format()', url.format);
+
+paths.forEach(function(p) {
+  benchmark('resolve("' + p + '")', function(u) { url.resolve(u, p) });
+});
+
+function benchmark(name, fun) {
+  process.stdout.write('benchmarking ' + name + ' ... ');
+
+  var timestamp = process.hrtime();
+  for (var i = 0; i < 25 * 1000; ++i) {
+    for (var j = 0, k = urls.length; j < k; ++j) fun(urls[j]);
+  }
+  timestamp = process.hrtime(timestamp);
+
+  var seconds = timestamp[0];
+  var millis = timestamp[1]; // actually nanoseconds
+  while (millis > 1000) millis /= 10;
+  var time = (seconds * 1000 + millis) / 1000;
+
+  process.stdout.write(util.format('%s sec\n', time.toFixed(3)));
+}