Changeset 1921 in kBuild

Timestamp:

Oct 24, 2008 12:30:58 AM (16 years ago)

Author:

bird

Message:

strcache2: disabled the experimental stuff because I'm unsure about the actual gain on all CPUs.

File:

• trunk/src/kmk/strcache2.c (modified) (2 diffs)

trunk/src/kmk/strcache2.c

@@ -139 +139 @@
         for some and better for others which isn't very cool...  */
 
-#define BIG_HASH_SIZE   32
-#define BIG_HASH_TAIL   12
-#define BIG_HASH_HEAD   16
+#if 0
+# define BIG_HASH_SIZE  32 /* kinda fast */
+# define BIG_HASH_HEAD  16
+# define BIG_HASH_TAIL  12
+#elif 0
+# define BIG_HASH_SIZE  68 /* kinda safe */
+# define BIG_HASH_HEAD  24
+# define BIG_HASH_TAIL  24
+#elif 0
+# define BIG_HASH_SIZE 128 /* safe */
+# define BIG_HASH_HEAD  32
+# define BIG_HASH_TAIL  32
+#endif
 
 #ifdef BIG_HASH_SIZE
@@ -212 +222 @@
 # ifdef BIG_HASH_SIZE
   /* long string? */
+#  if 0 /*BIG_HASH_SIZE > 128*/
+  if (MY_PREDICT_FALSE(len >= BIG_HASH_SIZE))
+#  else
   if (len >= BIG_HASH_SIZE)
+#  endif
     return strcache2_case_sensitive_hash_big (str, len);
 # endif