From 20d513f0a308fdaf7620501abcb70c06bbaa2dcd Mon Sep 17 00:00:00 2001
From: fengmk2 <fengmk2@gmail.com>
Date: Sat, 16 May 2015 22:20:57 +0800
Subject: [PATCH] Optimization killers

see https://github.com/petkaantonov/bluebird/wiki/Optimization-killers#3-managing-arguments
---
 index.js | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/index.js b/index.js
index af669ee..8a2c7a5 100644
--- a/index.js
+++ b/index.js
@@ -73,6 +73,7 @@ module.exports = function (app, options) {
     }
 
     // for performance reason
+    // https://github.com/petkaantonov/bluebird/wiki/Optimization-killers#3-managing-arguments
     if (arguments.length === 1) {
       // __(key)
       return text;
@@ -103,8 +104,11 @@ module.exports = function (app, options) {
     }
 
     // __(key, value1, value2, value3, value4, value5, ...)
-    var args = Array.prototype.slice.call(arguments, 1);
-    args.unshift(text);
+    var args = new Array(arguments.length);
+    args[0] = text;
+    for(var i = 1; i < args.length; i++) {
+      args[i] = arguments[i];
+    }
     return util.format.apply(util, args);
   };