benchmark: Add some path benchmarks for #1778

Path functions being benchmarked are:
* format
* isAbsolute
* join
* normalize
* relative
* resolve

PR-URL: https://github.com/nodejs/io.js/pull/1778
Reviewed-By: Сковорода Никита Андреевич <chalkerx@gmail.com>
Reviewed-By: Roman Reiss <me@silverwind.io>

benchmark/path/format.js

@@ -0,0 +1,31 @@
+var common = require('../common.js');
+var path = require('path');
+
+var bench = common.createBenchmark(main, {
+  type: ['win32', 'posix'],
+  n: [1e7],
+});
+
+function main(conf) {
+  var n = +conf.n;
+  var p = path[conf.type];
+  var test = conf.type === 'win32' ? {
+    root: 'C:\\',
+    dir: 'C:\\path\\dir',
+    base: 'index.html',
+    ext: '.html',
+    name: 'index'
+  } : {
+    root : '/',
+    dir : '/home/user/dir',
+    base : 'index.html',
+    ext : '.html',
+    name : 'index'
+  };
+
+  bench.start();
+  for (var i = 0; i < n; i++) {
+    p.format(test);
+  }
+  bench.end(n);
+}

benchmark/path/isAbsolute.js

@@ -0,0 +1,27 @@
+var common = require('../common.js');
+var path = require('path');
+
+var bench = common.createBenchmark(main, {
+  type: ['win32', 'posix'],
+  n: [1e6],
+});
+
+function main(conf) {
+  var n = +conf.n;
+  var p = path[conf.type];
+  var tests = conf.type === 'win32'
+    ? ['//server', 'C:\\baz\\..', 'bar\\baz', '.']
+    : ['/foo/bar', '/baz/..', 'bar/baz', '.'];
+
+  bench.start();
+  for (var i = 0; i < n; i++) {
+    runTests(p, tests);
+  }
+  bench.end(n);
+}
+
+function runTests(p, tests) {
+  for (var i = 0; i < tests.length; i++) {
+    p.isAbsolute(tests[i]);
+  }
+}

benchmark/path/join.js

@@ -0,0 +1,18 @@
+var common = require('../common.js');
+var path = require('path');
+
+var bench = common.createBenchmark(main, {
+  type: ['win32', 'posix'],
+  n: [1e6],
+});
+
+function main(conf) {
+  var n = +conf.n;
+  var p = path[conf.type];
+
+  bench.start();
+  for (var i = 0; i < n; i++) {
+    p.join('/foo', 'bar', '', 'baz/asdf', 'quux', '..');
+  }
+  bench.end(n);
+}

benchmark/path/normalize.js

@@ -0,0 +1,18 @@
+var common = require('../common.js');
+var path = require('path');
+
+var bench = common.createBenchmark(main, {
+  type: ['win32', 'posix'],
+  n: [1e6],
+});
+
+function main(conf) {
+  var n = +conf.n;
+  var p = path[conf.type];
+
+  bench.start();
+  for (var i = 0; i < n; i++) {
+    p.normalize('/foo/bar//baz/asdf/quux/..');
+  }
+  bench.end(n);
+}

benchmark/path/relative.js

@@ -0,0 +1,26 @@
+var common = require('../common.js');
+var path = require('path');
+
+var bench = common.createBenchmark(main, {
+  type: ['win32', 'posix'],
+  n: [1e5],
+});
+
+function main(conf) {
+  var n = +conf.n;
+  var runTest = conf.type === 'win32' ? runWin32Test : runPosixTest;
+
+  bench.start();
+  for (var i = 0; i < n; i++) {
+    runTest();
+  }
+  bench.end(n);
+}
+
+function runWin32Test() {
+  path.win32.relative('C:\\orandea\\test\\aaa', 'C:\\orandea\\impl\\bbb');
+}
+
+function runPosixTest() {
+  path.posix.relative('/data/orandea/test/aaa', '/data/orandea/impl/bbb');
+}

benchmark/path/resolve.js

@@ -0,0 +1,18 @@
+var common = require('../common.js');
+var path = require('path');
+
+var bench = common.createBenchmark(main, {
+  type: ['win32', 'posix'],
+  n: [1e6],
+});
+
+function main(conf) {
+  var n = +conf.n;
+  var p = path[conf.type];
+
+  bench.start();
+  for (var i = 0; i < n; i++) {
+    p.resolve('foo/bar', '/tmp/file/', '..', 'a/../subfile');
+  }
+  bench.end(n);
+}