From 66f0fb12d8713cb4745d69d4e92e0dbb544b14c3 Mon Sep 17 00:00:00 2001
From: Mark Baker <mark@lange.demon.co.uk>
Date: Tue, 26 Oct 2010 14:22:31 +0000
Subject: [PATCH] Minor performance tweaks

git-svn-id: https://phpexcel.svn.codeplex.com/svn/trunk@62813 2327b42d-5241-43d6-9e2a-de5ac946f064
---
 Classes/PHPExcel/Cell.php | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Classes/PHPExcel/Cell.php b/Classes/PHPExcel/Cell.php
index feaa7657..dc24dec9 100644
--- a/Classes/PHPExcel/Cell.php
+++ b/Classes/PHPExcel/Cell.php
@@ -658,7 +658,10 @@ class PHPExcel_Cell
 		if ($pColumnIndex < 26) {
 			return chr(65 + $pColumnIndex);
 		}
-		return PHPExcel_Cell::stringFromColumnIndex((int)($pColumnIndex / 26) -1).chr(65 + $pColumnIndex%26) ;
+		if ($pColumnIndex < 702) {
+			return chr(64 + ($pColumnIndex / 26)).chr(65 + $pColumnIndex % 26);
+		}
+		return chr(64 + (($pColumnIndex - 26) / 676)).chr(65 + ((($pColumnIndex - 26) % 676) / 26)).chr(65 + $pColumnIndex % 26);
 	}
 
 	/**