From fe56b8272b119a9937a5cc7fbafd8a9bd2fbe427 Mon Sep 17 00:00:00 2001
From: James Turner <zakalawe@mac.com>
Date: Thu, 7 May 2020 14:13:10 +0100
Subject: [PATCH] Windows: ensure RelWithDebInfo is fast

Default CMake RelWithDebInfo pessimizes inlining
---
 CMakeLists.txt | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index c49a1edd8..ce3b7bddf 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -492,6 +492,10 @@ endif()
 if(WIN32)
 
     if(MSVC)
+        # override CMake default RelWithDebInfo flags. This is important to ensure
+        # good performance
+        set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "/MT /Zi /O2 /Ob2 /D NDEBUG")
+
         set(MSVC_FLAGS "-DNOMINMAX -D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D_SCL_SECURE_NO_WARNINGS -D__CRT_NONSTDC_NO_WARNINGS /MP /O2")
         if(ENABLE_SIMD)
           if (X86)