From cba387a0a06289c271253b1fe05eb5f5a7bd4e18 Mon Sep 17 00:00:00 2001
From: Miroslav Stampar <miroslav.stampar@gmail.com>
Date: Thu, 26 Jul 2012 15:42:04 +0200
Subject: [PATCH] Minor speed up

---
 lib/utils/hashdb.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/utils/hashdb.py b/lib/utils/hashdb.py
index d906939b8..a2ae4cda4 100644
--- a/lib/utils/hashdb.py
+++ b/lib/utils/hashdb.py
@@ -6,6 +6,7 @@ See the file 'doc/COPYING' for copying permission
 """
 
 import hashlib
+import os
 import sqlite3
 import threading
 import time
@@ -54,7 +55,7 @@ class HashDB(object):
 
     def retrieve(self, key, unserialize=False):
         retVal = None
-        if key:
+        if key and (self._write_cache or os.path.isfile(self.filepath)):
             hash_ = HashDB.hashKey(key)
             retVal = self._write_cache.get(hash_, None)
             if not retVal: