[CMake] FYI - From Ninja-build mailing list - Fwd: Proposal: restat rules

[Peter Kümmel]

>
> OK, so I think this project is way too small for this test.  There is
> some fixed overhead in the process here, and we are seeing it.  We are
> talking about .5 seconds difference to check a whole build system.  If
> you want to do tests like this, you need a much bigger project.  I am
> sure that CMake will not be 50% slower for a larger project where we are
> not comparing .5 seconds to 1.1 seconds or .1 seconds.
>

I don't know a bigger project which supports qmake and cmake,
but I tried VTK:

Time to check when nothing to build:

      ninja(ms)   make(ms)
-j1   ~250        3600
-j2   ~250        2100
-j4   ~250        1700

Peter