enable LTO / optimize for speed (#256)

* changed so release build uses lto and optimizes for speed on Mac and Windows
* Linux does not currently support LTO due to toolchain limitations

1 files changed, 5 insertions, 1 deletions

diff --git a/xmake.lua b/xmake.lua
index fc896d3e8..c49a71901 100644
--- a/xmake.lua
+++ b/xmake.lua
@@ -51,7 +51,11 @@ add_rules("mode.debug", "mode.release")
 --add_rules("c++.unity_build")
 
 if is_mode("release") then
-    set_optimize("smallest")
+    -- LTO does not appear to work with the current UE toolchain
+    if not is_plat("linux") then
+        set_policy("build.optimization.lto", true)
+    end
+    set_optimize("fastest")
 end
 
 if is_mode("debug") then