Not running the systemc test SConscript reduces the scons startup time (before any file is compiled) from about 10s to 4s on my machine. The performance investigation was done at: https://gem5.atlassian.net/browse/GEM5-256 As before, the systemc tests are still automatically built when they are run with: src/systemc/tests/verify.py --update-json build/ARM -j `nproc` \ --filter-file src/systemc/tests/working.filt Change-Id: I33b7a53c0a7d70386ab17d7bb4886c84a97a2eb3 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/25385 Reviewed-by: Gabe Black <gabeblack@google.com> Maintainer: Gabe Black <gabeblack@google.com> Tested-by: kokoro <noreply+kokoro@google.com>