# HG changeset patch
# User Benoit Boissinot <benoit.boissinot@ens-lyon.org>
# Date 1158940702 -7200
# Node ID 97420a49188d328b62308c69f892f468d7a6f8c2
# Parent  e69a0cbe268ef51843ef2bf98e6db9390744db01
add comments in cachefunc

diff --git a/mercurial/util.py b/mercurial/util.py
--- a/mercurial/util.py
+++ b/mercurial/util.py
@@ -26,8 +26,11 @@ class SignalInterrupt(Exception):
 
 def cachefunc(func):
     '''cache the result of function calls'''
+    # XXX doesn't handle keywords args
     cache = {}
     if func.func_code.co_argcount == 1:
+        # we gain a small amount of time because
+        # we don't need to pack/unpack the list
         def f(arg):
             if arg not in cache:
                 cache[arg] = func(arg)