BMesh: simplify hashing for dyntopo

Was using pointer hashing when the keys are in fact uint's.
Since they're well distributed from the rangetree,
no need to do bit-shifting tricks. just use int as hash.
Gives ~8% speedup in own tests.

1 files changed, 5 insertions, 0 deletions

diff --git a/source/blender/blenlib/intern/BLI_ghash.c b/source/blender/blenlib/intern/BLI_ghash.c
index dae7af6a927..484fe70104e 100644
--- a/source/blender/blenlib/intern/BLI_ghash.c
+++ b/source/blender/blenlib/intern/BLI_ghash.c
@@ -1091,6 +1091,11 @@ unsigned int BLI_ghashutil_inthash_p_murmur(const void *ptr)
 	return BLI_hash_mm2((const unsigned char *)&key, sizeof(key), 0);
 }
 
+unsigned int BLI_ghashutil_inthash_p_simple(const void *ptr)
+{
+	return GET_UINT_FROM_POINTER(ptr);
+}
+
 bool BLI_ghashutil_intcmp(const void *a, const void *b)
 {
 	return (a != b);