diff --git a/CMakeLists.txt b/CMakeLists.txt
index c5655246..922af58b 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -109,7 +109,7 @@ target_compile_options(
     PUBLIC -fno-sized-deallocation
     PUBLIC $<$<CONFIG:DEBUG>:-g>
     # PUBLIC $<$<CONFIG:DEBUG>:-O0>
-    PUBLIC $<$<CONFIG:DEBUG>:-O3>
+    PUBLIC $<$<CONFIG:DEBUG>:-Ofast>
     PUBLIC $<$<CONFIG:RELEASE>:-Ofast>
     PUBLIC $<$<CONFIG:DEBUG>:-fno-inline>
     PUBLIC $<$<CONFIG:DEBUG>:-fkeep-static-functions>