From 1279adc75616a6402e37df8d10071148eb3ee1b6 Mon Sep 17 00:00:00 2001
From: Andrei Sedoi <bsnote@gmail.com>
Date: Thu, 26 Nov 2015 15:55:05 +0000
Subject: [PATCH] timers: optimize callback call: bind -> arrow

ES6 arrow functions are much more efficient than `.bind()` functions.

PR-URL: https://github.com/nodejs/node/pull/4038
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>
---
 lib/timers.js | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/lib/timers.js b/lib/timers.js
index b75b7ccfc0a85d..543a1bf601c7ea 100644
--- a/lib/timers.js
+++ b/lib/timers.js
@@ -192,21 +192,21 @@ exports.setTimeout = function(callback, after) {
     case 2:
       break;
     case 3:
-      ontimeout = callback.bind(timer, arguments[2]);
+      ontimeout = () => callback.call(timer, arguments[2]);
       break;
     case 4:
-      ontimeout = callback.bind(timer, arguments[2], arguments[3]);
+      ontimeout = () => callback.call(timer, arguments[2], arguments[3]);
       break;
     case 5:
       ontimeout =
-          callback.bind(timer, arguments[2], arguments[3], arguments[4]);
+        () => callback.call(timer, arguments[2], arguments[3], arguments[4]);
       break;
     // slow case
     default:
       var args = new Array(length - 2);
       for (var i = 2; i < length; i++)
         args[i - 2] = arguments[i];
-      ontimeout = callback.apply.bind(callback, timer, args);
+      ontimeout = () => callback.apply(timer, args);
       break;
   }
   timer._onTimeout = ontimeout;
@@ -247,20 +247,20 @@ exports.setInterval = function(callback, repeat) {
     case 2:
       break;
     case 3:
-      ontimeout = callback.bind(timer, arguments[2]);
+      ontimeout = () => callback.call(timer, arguments[2]);
       break;
     case 4:
-      ontimeout = callback.bind(timer, arguments[2], arguments[3]);
+      ontimeout = () => callback.call(timer, arguments[2], arguments[3]);
       break;
     case 5:
       ontimeout =
-          callback.bind(timer, arguments[2], arguments[3], arguments[4]);
+        () => callback.call(timer, arguments[2], arguments[3], arguments[4]);
       break;
     default:
       var args = new Array(length - 2);
       for (var i = 2; i < length; i += 1)
         args[i - 2] = arguments[i];
-      ontimeout = callback.apply.bind(callback, timer, args);
+      ontimeout = () => callback.apply(timer, args);
       break;
   }
   timer._onTimeout = wrapper;
@@ -272,7 +272,7 @@ exports.setInterval = function(callback, repeat) {
   return timer;
 
   function wrapper() {
-    timer._repeat.call(this);
+    timer._repeat();
 
     // Timer might be closed - no point in restarting it
     if (!timer._repeat)