-----Urspruengliche Nachricht-----
Von: Clinton Stimpson [mailto:clin...@elemtech.com]
Gesendet: Dienstag, 21. Januar 2014 16:10
An: cmake-developers@cmake.org
Cc: Bill Hoffman; Dominik Bernhardt
Betreff: Re: [cmake-developers] [CMake] CMake 2.8.12.201401116 is
much slower than 2.8.12.1
[...]
I'm surprised how this small change added a 20% slowdown.
-set_property(DIRECTORY APPEND PROPERTY COMPILE_DEFINITIONS_DEBUG
QT_DEBUG)
+set_property(DIRECTORY APPEND PROPERTY COMPILE_DEFINITIONS $<$<NOT:
$<CONFIG:Debug>>:QT_NO_DEBUG>)
I tried this project on Windows with CMake master (my own build) and
CMake (kitware build) and CMake master was slightly faster, then
modifying UseQt.cmake made it slightly faster still.
Dominik, if you are seeing a massive slowdown, can you narrow it down?
It may not be generator expression related at all.
I just tested it again with the latest master from today. For my
particular project the configure step with the current master takes
290s. If I only replace the UseQt4.cmake in the master with the
version from 2.8.12.1 the configure time goes down to 23s!!
I'm also surprised that such a tiny change results in a slowdown of
more than 1000%. But at least in my setup this is the case.
Dominik
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