diff --git a/src/mcedit2/rendering/blockmodels.pyx b/src/mcedit2/rendering/blockmodels.pyx
index 4a5143b..c3f647e 100644
--- a/src/mcedit2/rendering/blockmodels.pyx
+++ b/src/mcedit2/rendering/blockmodels.pyx
@@ -1,4 +1,4 @@
-#cython: boundscheck=False
+#cython: boundscheck=False, profile=True
 """
     blockmodels
 """