From 818c4249d27c820c4ad54297dc0cc56547103abc Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Thu, 16 Dec 2010 13:31:09 -0700
Subject: [PATCH] function to time cover loading

---
 src/calibre/library/__init__.py | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

diff --git a/src/calibre/library/__init__.py b/src/calibre/library/__init__.py
index 177c5063ac..d08ca0b44f 100644
--- a/src/calibre/library/__init__.py
+++ b/src/calibre/library/__init__.py
@@ -8,7 +8,7 @@ def db(path=None):
     return LibraryDatabase2(path if path else prefs['library_path'])
 
 
-def generate_test_db(library_path,
+def generate_test_db(library_path, # {{{
         num_of_records=20000,
         num_of_authors=6000,
         num_of_tags=10000,
@@ -58,4 +58,24 @@ def generate_test_db(library_path,
     t = time.time() - start
     print '\nGenerated', num_of_records, 'records in:', t, 'seconds'
     print 'Time per record:', t/float(num_of_records)
+# }}}
+
+def cover_load_timing(path=None):
+    from PyQt4.Qt import QApplication, QImage
+    import os, time
+    app = QApplication([])
+    app
+    d = db(path)
+    paths = [d.cover(i, index_is_id=True, as_path=True) for i in
+            d.data.iterallids()]
+    paths = [p for p in paths if (p and os.path.exists(p) and os.path.isfile(p))]
+
+    start = time.time()
+
+    for p in paths:
+        with open(p, 'rb') as f:
+            img = QImage()
+            img.loadFromData(f.read())
+
+    print 'Average load time:', (time.time() - start)/len(paths), 'seconds'