It used to be Os (optimize for size). not O2.
We could use O2 for the release builds IMO.

Timo

Am 31.07.2013 16:39, schrieb Alex Ionescu:

I don't really like this. Maybe only do this on the build server, or at least don't do it to kernel code. "Measurable" difference in performance doesn't really mean much on an OS that does not have any performance infrastructure, but trust me, there's a difference between O1 and O2.

Best regards,
Alex Ionescu

On Wed, Jul 31, 2013 at 6:04 AM, <akhaldi@svn.reactos.org> wrote:

Author: akhaldi
Date: Wed Jul 31 13:04:38 2013
New Revision: 59598

URL: http://svn.reactos.org/svn/reactos?rev=59598&view=rev
Log:
[CMAKE/GCC]
* Compile debug builds using -O1 instead of -Os. This results in faster compilation time with no measurable difference in runtime performance according to tests.
CORE-7374 #resolve #comment Committed in r59598.

Modified:
    trunk/reactos/cmake/config.cmake

Modified: trunk/reactos/cmake/config.cmake
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/cmake/config.cmake?rev=59598&r1=59597&r2=59598&view=diff
==============================================================================
--- trunk/reactos/cmake/config.cmake    [iso-8859-1] (original)
+++ trunk/reactos/cmake/config.cmake    [iso-8859-1] Wed Jul 31 13:04:38 2013
@@ -10,7 +10,7 @@
 set(TUNE "i686" CACHE STRING
 "Which CPU ReactOS should be optimized for.")

-set(OPTIMIZE "1" CACHE STRING
+set(OPTIMIZE "4" CACHE STRING
 "What level of optimization to use.
  0 = off
  1 = Default option, optimize for size (-Os) with some additional options

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