Re: Slowdown around 5.0.5-dev-0

[Bart Schaefer <schaefer@xxxxxxxxxxxxxxxx>]

On Oct 25,  8:35am, Sebastian Gniazdowski wrote:
}
} I calibrated for string_test, it's interesting how much slower
} array_test is on OS X. My machine is 2.3 GHz, maybe that's some reason
} (your is faster IIRC).


diff --git a/Src/mem.c b/Src/mem.c
index 158ad96..3138bb1 100644
--- a/Src/mem.c
+++ b/Src/mem.c
@@ -79,9 +79,16 @@
 
 #include <sys/mman.h>
 
+#if 0
+/*
+ * This change was designed to enable use of memory mapping on MacOS.
+ * However, performance tests indicate that MacOS mapped regions are
+ * significantly slower to allocate than memory from malloc().
+ */
 #if defined(MAP_ANON) && !defined(MAP_ANONYMOUS)
 #define MAP_ANONYMOUS MAP_ANON
 #endif
+#endif /* 0 */
 
 #if defined(MAP_ANONYMOUS) && defined(MAP_PRIVATE)