diff --git a/CMakeLists.txt b/CMakeLists.txt
index acabc978..2358c533 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -190,7 +190,7 @@ target_compile_options(
     PUBLIC $<$<CONFIG:DEBUG>:-g>
     PUBLIC $<$<CONFIG:DEBUG>:-O0>
 #    PUBLIC $<$<CONFIG:DEBUG>:-Os>
-    PUBLIC $<$<CONFIG:RELEASE>:-O2>
+    PUBLIC $<$<CONFIG:RELEASE>:-Ofast>
     PUBLIC $<$<CONFIG:DEBUG>:-fno-inline>
     PUBLIC $<$<CONFIG:DEBUG>:-fkeep-static-functions>
 )