[CMake] CMake Project Generation Speedup

[J. Caleb Wherry]

Did anything ever come of this?

I am in a similar boat: we have >800 targets on our full build (native C++,
Managed C++, C#, Java, CUDA, etc) and the majority of the time for the
configure/generate steps takes place in the generate step (>70%).

I understand there is a lot of IO since the generate step has to write the
project files and filters for each C++ project (the majority of our
projects) for VS generators (what we use). I'm just looking to see if there
is anything to look at or potentially speedup up the generate step besides
"get a faster drive".

Thanks!
-Caleb

On Thu, Nov 17, 2016 at 11:15 AM Damian <damian.campeanu at gmail.com> wrote:

> Hi all,
>
> We are still in the process of switching our large Make-based build to
> CMake. One of the issues we're running into is the time it takes to reparse
> and regenerate the CMake project (whether ninja, VS, or make) after
> touching any CMake file. To give you an idea, we have about 1000 targets
> and that takes a good 2 min for CMake to rerun.
>
> Are there any plans to speed this up? Maybe parallelize it in some way or
> do a better job regenerating only what needs regenerating? Is there
> anything we can do on our side to reduce our regeneration times?
>
> For example, if using a VS generator, each directory in the source that
> has a CMakeLists.txt gets a .vcproj and .sln generated. Ideally, if I touch
> one of those CMakeLists.txt, only that .sln/.vcproj would get regenerated.
>
> Thanks for any help.
> --
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-- 
J. Caleb Wherry
*Scientific Software Engineer*

<http://www.calebwherry.com>
http://www.calebwherry.com
+1 (615) 708-5651
calebwherry at gmail.com
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