From b1a86b5f9f93d499459368854f96401c298881c8 Mon Sep 17 00:00:00 2001
From: Samuel Georges <sam@daftspunk.com>
Date: Sat, 30 Jul 2016 16:14:54 +1000
Subject: [PATCH] Performance enhancement Don't use deep handing lastMod check
 if we don't have to

---
 modules/system/classes/CombineAssets.php | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/modules/system/classes/CombineAssets.php b/modules/system/classes/CombineAssets.php
index 7c903ff1f..e2e4d84f6 100644
--- a/modules/system/classes/CombineAssets.php
+++ b/modules/system/classes/CombineAssets.php
@@ -309,8 +309,14 @@ class CombineAssets
             $this->setHashOnCombinerFilters($cacheKey);
 
             $combiner = $this->prepareCombiner($assets);
-            $factory = new AssetFactory($this->localPath);
-            $lastMod = $factory->getLastModified($combiner);
+
+            if ($this->useDeepHashing) {
+                $factory = new AssetFactory($this->localPath);
+                $lastMod = $factory->getLastModified($combiner);
+            }
+            else {
+                $lastMod = $combiner->getLastModified();
+            }
 
             $cacheInfo = [
                 'version'   => $cacheKey.'-'.$lastMod,