add TimedLog for debugging

anki/utils.py

@@ -17,6 +17,7 @@ import sys
 import locale
 from hashlib import sha1
 import platform
+import traceback
 
 from anki.lang import _, ngettext
 
@@ -384,3 +385,15 @@ def platDesc():
         except:
             continue
     return theos
+
+# Debugging
+##############################################################################
+
+class TimedLog(object):
+    def __init__(self):
+        self._last = time.time()
+    def log(self, s):
+        path, num, fn, y = traceback.extract_stack(limit=2)[0]
+        sys.stderr.write("%5dms: %s(): %s\n" % ((time.time() - self._last)*1000, fn, s))
+        self._last = time.time()
+