would it be time to replace scons with meson build system?

[Claus Klein]

Claus-MBP:build-performance clausklein$ ./gen_src.py outdir

generate 10 directories containing each 10 source files

Claus-MBP:build-performance clausklein$ ./measure.py outdir

Running command: rm -rf buildcmake && mkdir -p buildcmake && cd buildcmake && CC=clang cmake -DCMAKE_BUILD_TYPE=Debug ..

Running command: cd buildcmake && make -j 2

Running command: cd buildcmake && make -j 2

Running command: rm -rf buildcmakeninja && mkdir -p buildcmakeninja && cd buildcmakeninja && CC=clang cmake -DCMAKE_BUILD_TYPE=Debug -G Ninja ..

Running command: cd buildcmakeninja && ninja -j 2

Running command: cd buildcmakeninja && ninja -j 2

Running command: rm -rf buildmeson && mkdir -p buildmeson && CC=clang meson buildmeson

Running command: ninja -C buildmeson -j 2

Running command: ninja -C buildmeson -j 2

Running command: rm -rf buildscons .sconsign.dblite

Running command: CC=clang scons -j 2

Running command: CC=clang scons -j 2

cmake-make

 2.910 gen

 12.965 build

 0.617 empty build

cmake-ninja

 1.215 gen

 9.315 build

 0.022 empty build

meson

 2.517 gen

 9.370 build

 0.018 empty build

scons

 0.016 gen

 12.597 build

 5.003 empty build

Claus-MBP:build-performance clausklein$ 

see too https://mesonbuild.com/Simple-comparison.html