From dcf8b6678afa0ffad5f2fa81e0739e6ee7915ac5 Mon Sep 17 00:00:00 2001
From: Jan de Mooij <jdemooij@mozilla.com>
Date: Wed, 16 Jul 2014 10:32:57 +0200
Subject: [PATCH] Bug 1030706 - Disable PGO in js/src for MSVC 2010. r=glandium

---
 js/src/moz.build | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/js/src/moz.build b/js/src/moz.build
index c527c23b830..dd6de6e15f4 100644
--- a/js/src/moz.build
+++ b/js/src/moz.build
@@ -403,7 +403,10 @@ else:
         'perf/pm_stub.cpp'
     ]
 
-MSVC_ENABLE_PGO = True
+# Disable PGO for MSVC 2010 due to unpredictable performance, see
+# bug 1030706.
+if CONFIG['_MSC_VER'] != '1600':
+    MSVC_ENABLE_PGO = True
 
 HOST_SOURCES += [
     'jskwgen.cpp',