benchmark: add benches for fs.stat & fs.statSync

Add very simple benchmarks for `fs.stat` and `fs.statSync` as
well as `fs.lstat` and `fs.lstatSync` based on the `readdir`
benchmarks.

PR-URL: https://github.com/nodejs/node/pull/8338
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Brian White <mscdex@mscdex.net>

1 files changed, 21 insertions, 0 deletions

diff --git a/benchmark/fs/bench-statSync.js b/benchmark/fs/bench-statSync.js
new file mode 100644
index 0000000000..ba1e8168b4
--- /dev/null
+++ b/benchmark/fs/bench-statSync.js
@@ -0,0 +1,21 @@
+'use strict';
+
+const common = require('../common');
+const fs = require('fs');
+
+const bench = common.createBenchmark(main, {
+  n: [1e4],
+  kind: ['lstatSync', 'statSync']
+});
+
+
+function main(conf) {
+  const n = conf.n >>> 0;
+  const fn = fs[conf.kind];
+
+  bench.start();
+  for (var i = 0; i < n; i++) {
+    fn(__filename);
+  }
+  bench.end(n);
+}