diff --git a/byterun/performance_check.sh b/byterun/performance_check.sh
index fee1d0931..e27172c14 100755
--- a/byterun/performance_check.sh
+++ b/byterun/performance_check.sh
@@ -1,6 +1,9 @@
 #!/usr/bin/env bash
 
-dune build > /dev/null
+xmake build
+cp "build/linux/x86_64/release/byterun" byterun.exe
+
+# dune build > /dev/null
 
 compiler=../_build/default/src/Driver.exe
 
diff --git a/byterun/xmake.lua b/byterun/xmake.lua
index 0949913f1..3a7ad8ce3 100644
--- a/byterun/xmake.lua
+++ b/byterun/xmake.lua
@@ -5,6 +5,7 @@ set_languages("c++20", "c11")
 
 target("byterun")
     set_kind("binary")
+    add_cxflags("-O3")
     add_includedirs("include", "../runtime")
     add_files("../runtime/**.c", "../runtime/**.S")
     add_files( "src/**.cpp", "src/**.c")