util: faster arrayToHash

The `util.format()` is used frequently, make the method faster
is better.

R-URL: https://github.com/nodejs/node/pull/3964
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Brian White <mscdex@mscdex.net>
Reviewed-By: James M Snell <jasnell@gmail.com>

1 files changed, 15 insertions, 0 deletions

diff --git a/benchmark/util/inspect.js b/benchmark/util/inspect.js
new file mode 100644
index 0000000000..8a59e6b48e
--- /dev/null
+++ b/benchmark/util/inspect.js
@@ -0,0 +1,15 @@
+var util = require('util');
+
+var common = require('../common.js');
+
+var bench = common.createBenchmark(main, {n: [5e6]});
+
+function main(conf) {
+  var n = conf.n | 0;
+
+  bench.start();
+  for (var i = 0; i < n; i += 1) {
+    var r = util.inspect({a: 'a', b: 'b', c: 'c', d: 'd'});
+  }
+  bench.end(n);
+}