windows project_test speedup by 2
@@ -652,6 +652,7 @@ def _run_tests(all_tests, log_name_base, failfast, extra_args):
#
# Remove this once the following issue has been resolved:
# https://github.com/mesonbuild/meson/pull/2082
+ if not mesonlib.is_windows(): # twice as fast on Windows by *not* multiplying by 2.
num_workers *= 2
executor = ProcessPoolExecutor(max_workers=num_workers)
