[PATCH 0/1] MR10805: Draft: msvcrt: only convert _tolower_l if not exact match already

[Stephan Seitz (＠theHamsta)]

This optimizations brought some speed-ups in
https://gitlab.winehq.org/wine/wine/-/merge_requests/10804 for the
equivalent `memicmp_strW` function as it avoids converting and locale
lookup for exact matches.

-- 
https://gitlab.winehq.org/wine/wine/-/merge_requests/10805

[PATCH 1/1] msvcrt: only convert _tolower_l if not exact match already

[Stephan Seitz]

From: Stephan Seitz <[e-mail]>

This optimizations brought some speed-ups in
https://gitlab.winehq.org/wine/wine/-/merge_requests/10804 for the
equivalent `memicmp_strW` function.
---
 dlls/msvcrt/string.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/dlls/msvcrt/string.c b/dlls/msvcrt/string.c
index 6b4ffbf45b5..76749631c71 100644
--- a/dlls/msvcrt/string.c
+++ b/dlls/msvcrt/string.c
@@ -3435,6 +3435,9 @@ int __cdecl _memicmp_l(const void *v1, const void *v2, size_t len, _locale_t loc
 
     while (len--)
     {
+        if (*s1 == *s2) {
+            continue;
+        }
         if ((ret = _tolower_l(*s1, locale) - _tolower_l(*s2, locale)))
             break;
         s1++;
-- 
GitLab

https://gitlab.winehq.org/wine/wine/-/merge_requests/10805