[Python-checkins] cpython: Optimize findchar() for PyUnicode_1BYTE_KIND: use memchr and memrchr

[victor.stinner]

http://hg.python.org/cpython/rev/e5bd48b43a58
changeset:   72903:e5bd48b43a58
user:        Victor Stinner <victor.stinner at haypocalc.com>
date:        Thu Oct 13 00:18:12 2011 +0200
summary:
  Optimize findchar() for PyUnicode_1BYTE_KIND: use memchr and memrchr

files:
  Objects/unicodeobject.c |  8 ++++++++
  1 files changed, 8 insertions(+), 0 deletions(-)


diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -530,6 +530,14 @@
 {
     /* like wcschr, but doesn't stop at NULL characters */
     Py_ssize_t i;
+    if (kind == 1) {
+        if (direction == 1)
+            return memchr(s, ch, size);
+#ifdef HAVE_MEMRCHR
+        else
+            return memrchr(s, ch, size);
+#endif
+    }
     if (direction == 1) {
         for(i = 0; i < size; i++)
             if (PyUnicode_READ(kind, s, i) == ch)

-- 
Repository URL: http://hg.python.org/cpython