encoding.lower: use fast ASCII lower
authorSiddharth Agarwal <sid0@fb.com>
Fri, 03 Oct 2014 18:45:56 -0700
changeset 22779 d9585dda63c3
parent 22778 80f2b63dd83a
child 22780 d8ff1f671aed
encoding.lower: use fast ASCII lower This benefits, among other things, the case collision auditor. On a Linux system with a large real-world repo where all filenames are ASCII, hg perfcca: before: wall 0.260157 comb 0.270000 user 0.230000 sys 0.040000 (best of 38) after: wall 0.164616 comb 0.160000 user 0.160000 sys 0.000000 (best of 54)
mercurial/encoding.py
--- a/mercurial/encoding.py	Fri Oct 03 18:42:39 2014 -0700
+++ b/mercurial/encoding.py	Fri Oct 03 18:45:56 2014 -0700
@@ -270,8 +270,7 @@
 def lower(s):
     "best-effort encoding-aware case-folding of local string s"
     try:
-        s.decode('ascii') # throw exception for non-ASCII character
-        return s.lower()
+        return asciilower(s)
     except UnicodeDecodeError:
         pass
     try: