From 890ecc27cb1f6fa62763cede74e2b4c0c5ea01b3 Mon Sep 17 00:00:00 2001
From: eddiz <16883778+eddiz@users.noreply.github.com>
Date: Sun, 19 Nov 2017 22:31:21 +0100
Subject: [PATCH 1/3] Optional Compiler Optimization

Enable all Compile Optimization by setting according compiler flags. (Visual Studio tested, gcc and other should work properly, but untested)
---
 CMakeLists.txt | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4e7e699..d25623c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -101,6 +101,17 @@ if (ENABLE_GOMA)
   set_compiler_launcher(ENABLE_GOMA gomacc)
 endif ()
 
+if(ENABLE_EXTRA_SPEED)
+	if(MSVC)
+		#enable parallel builds
+		add_compile_options("$<$<CXX_COMPILER_ID:MSVC>:/Qpar>")
+		#maximum optimization in Release mode
+		add_compile_options("$<$<AND:$<CXX_COMPILER_ID:MSVC>,$<CONFIG:RELEASE>>:/Ox>")
+	else()
+		add_compiler_flag_if_supported("-O3")
+	endif()
+endif()
+
 # Generate a version file containing repository info.
 include(FindGit)
 find_package(Git)

From f4f5c81a5620c2c2abc861939fdb1c7222a2401e Mon Sep 17 00:00:00 2001
From: eddiz <16883778+eddiz@users.noreply.github.com>
Date: Tue, 21 Nov 2017 14:22:01 +0100
Subject: [PATCH 2/3] Update CMakeLists.txt

updated compiler setting for extra speed-up as a follow-up of the pull discussion
---
 CMakeLists.txt | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index d25623c..d3bd3cd 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -102,14 +102,14 @@ if (ENABLE_GOMA)
 endif ()
 
 if(ENABLE_EXTRA_SPEED)
-	if(MSVC)
-		#enable parallel builds
-		add_compile_options("$<$<CXX_COMPILER_ID:MSVC>:/Qpar>")
-		#maximum optimization in Release mode
-		add_compile_options("$<$<AND:$<CXX_COMPILER_ID:MSVC>,$<CONFIG:RELEASE>>:/Ox>")
-	else()
-		add_compiler_flag_if_supported("-O3")
-	endif()
+  if(MSVC)
+    #maximum optimization in Release mode
+    add_compile_options("$<$<CONFIG:RELEASE>:/Ox>")
+	#add_compile_options("$<$<CONFIG:MinSizeRel>:/Ox>") #uncomment if consistent compiler settings are more important then binary size
+	#add_compile_options("$<$<CONFIG:RelWithDebInfo>:/Ox>") #uncomment if consistent compiler settings are more important then binary size
+  else()
+    add_compiler_flag_if_supported("-O3")
+  endif()
 endif()
 
 # Generate a version file containing repository info.

From b83f22b16b16f6546d97b45324bcd437882329a8 Mon Sep 17 00:00:00 2001
From: tomfinegan <tomfinegan@google.com>
Date: Wed, 29 Nov 2017 08:58:49 -0800
Subject: [PATCH 3/3] Increase optimization level in release builds.

When users pass turn on ENABLE_EXTRA_SPEED at CMake generation, use -O3
in gcc like compilers, and /Ox in MSVC.
---
 CMakeLists.txt | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index d3bd3cd..d002e4e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -103,10 +103,8 @@ endif ()
 
 if(ENABLE_EXTRA_SPEED)
   if(MSVC)
-    #maximum optimization in Release mode
+    # Maximum optimization in Release mode.
     add_compile_options("$<$<CONFIG:RELEASE>:/Ox>")
-	#add_compile_options("$<$<CONFIG:MinSizeRel>:/Ox>") #uncomment if consistent compiler settings are more important then binary size
-	#add_compile_options("$<$<CONFIG:RelWithDebInfo>:/Ox>") #uncomment if consistent compiler settings are more important then binary size
   else()
     add_compiler_flag_if_supported("-O3")
   endif()