From ac2bce0b0c91ba9fc593d8c53c68b42d3c1e4954 Mon Sep 17 00:00:00 2001
From: Evan Lucas <evanlucas@me.com>
Date: Wed, 23 Sep 2015 16:29:01 -0500
Subject: [PATCH] path: improve posixSplitPath performance

Instead of slicing the first element off of the matches, shift and then
return. This improves performance of the following path functions:

- basename: 18-20%
- extname: 60-70%
- dirname: 18-20%
- parse: 20-25%

PR-URL: https://github.com/nodejs/node/pull/3034
Reviewed-By: Brian White <mscdex@mscdex.net>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>
---
 lib/path.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/path.js b/lib/path.js
index 4bcb2b3672..0c9c656e66 100644
--- a/lib/path.js
+++ b/lib/path.js
@@ -408,7 +408,9 @@ var posix = {};
 
 
 function posixSplitPath(filename) {
-  return splitPathRe.exec(filename).slice(1);
+  const out = splitPathRe.exec(filename);
+  out.shift();
+  return out;
 }