From ab2c7c2c079b51ffd4ed7ef00724ef3f8d2636ec Mon Sep 17 00:00:00 2001
From: John Chilton <jmchilton@gmail.com>
Date: Tue, 1 Dec 2015 12:33:35 +0000
Subject: [PATCH] Tool execution micro optimization...

... Don't create an extra list to reverse, just iterate over in reversed order.
---
 lib/galaxy/tools/actions/__init__.py | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/lib/galaxy/tools/actions/__init__.py b/lib/galaxy/tools/actions/__init__.py
index 02d6fb9216d..091d7738426 100644
--- a/lib/galaxy/tools/actions/__init__.py
+++ b/lib/galaxy/tools/actions/__init__.py
@@ -178,9 +178,7 @@ class DefaultToolAction( object ):
         input_names = []
         input_ext = 'data'
         input_dbkey = incoming.get( "dbkey", "?" )
-        inp_items = inp_data.items()
-        inp_items.reverse()
-        for name, data in inp_items:
+        for name, data in reversed(inp_data.items()):
             if not data:
                 data = NoneDataset( datatypes_registry=trans.app.datatypes_registry )
                 continue