diff --git a/CMakeLists.txt b/CMakeLists.txt
index dd8aec0..2f09b52 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -7,13 +7,16 @@ set(CMAKE_CXX_FLAGS "-Wall -pthread")
 set(CMAKE_CXX_FLAGS_RELEASE "-Os")
 
 if((${CMAKE_CXX_COMPILER_ID} STREQUAL GNU) OR (${CMAKE_CXX_COMPILER_ID} STREQUAL Clang))
-    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fstack-protector -fstack-clash-protection")
+    set(CMAKE_CXX_FLAGS "-flto ${CMAKE_CXX_FLAGS} -fstack-protector -fstack-clash-protection")
 endif()
 
 if (${CMAKE_CXX_COMPILER_ID} STREQUAL GNU)
     set(CMAKE_EXE_LINKER_FLAGS "-static-libgcc")
     set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -fira-loop-pressure -ftree-loop-distribution -floop-interchange -ftree-vectorize -fipa-pta -s")
-    set(CMAKE_CXX_FLAGS  "-flto -fno-use-linker-plugin -fwhole-program ${CMAKE_CXX_FLAGS}")
+    set(CMAKE_CXX_FLAGS  "-fno-use-linker-plugin -fwhole-program ${CMAKE_CXX_FLAGS}")
+elseif(${CMAKE_CXX_COMPILER_ID} STREQUAL Clang)
+    set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -ftree-vectorize")
+    set(CMAKE_CXX_FLAGS  "-fwhole-program-vtables ${CMAKE_CXX_FLAGS}")
 endif()
 
 if(MINGW OR MSVC)