improve editmode triangulation by re-using the loop array when

possiblem, this has to guess when the size is too big so as to re-
well.

If this isnt done, then the number of faces is used to allocate the
initial array to at least avoid many small allocs.

added BLI_array_reserve() to reserve elements and avoid reallocing many
small arrays when the loop starts.

1 files changed, 4 insertions, 0 deletions

diff --git a/source/blender/blenlib/BLI_array.h b/source/blender/blenlib/BLI_array.h
index bd14793e0f9..a5453f1537b 100644
--- a/source/blender/blenlib/BLI_array.h
+++ b/source/blender/blenlib/BLI_array.h
@@ -140,6 +140,10 @@
 	(&arr[_##arr##_count - 1])                                                \
 )
 
+#define BLI_array_reserve(arr, num)                                           \
+	BLI_array_growitems(arr, num), (void)(_##arr##_count -= num)
+
+
 #define BLI_array_free(arr)                                                   \
 	if (arr && (char *)arr != _##arr##_static) {                              \
 	    BLI_array_fake_user(arr);                                             \