diff mbox

Improve performance of strcpy

Message ID 000201cfd757$718a9d70$549fd850$@com
State New
Headers show

Commit Message

Wilco Sept. 23, 2014, 5:54 p.m. UTC 
Hi,

Similar to previous patches, this patch improves strcpy performance by using strlen+memcpy. This is
significantly faster than a simple byte-loop, on bench-strcpy speedup is > 2x.

ChangeLog:
2014-09-23  Wilco Dijkstra  <wdijkstr@arm.com>

	* string/strcpy.c (strcpy):
	Improve performance by using strlen and memcpy.

---
 string/strcpy.c |   13 +------------
 1 file changed, 1 insertion(+), 12 deletions(-)
diff mbox

Patch

diff --git a/string/strcpy.c b/string/strcpy.c
index caa234a..91f9cc6 100644
--- a/string/strcpy.c
+++ b/string/strcpy.c
@@ -24,17 +24,6 @@ 
 char *
 strcpy (char *dest, const char *src)
 {
-  char c;
-  char *s = (char *) src;
-  const ptrdiff_t off = dest - s - 1;
-
-  do
-    {
-      c = *s++;
-      s[off] = c;
-    }
-  while (c != '\0');
-
-  return dest;
+  return memcpy (dest, src, strlen (src) + 1));
 }
 libc_hidden_builtin_def (strcpy)