[CMake] CMake Project Generation Speedup

[J. Caleb Wherry]

I was also surprised when "cmake --trace" gave 0 information related to the
generate step. I assume this is expected behavior?

Oh and:

CMake: 3.13.4
Visual Studio 2017 15.9.9
Win7

-Caleb

On Wed, Mar 20, 2019 at 4:53 PM J. Caleb Wherry <calebwherry at gmail.com>
wrote:

> 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
>


-- 
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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