reduce diff #1653

Job	Run time
build (ubuntu-24.04, clang-18)	4m 37s
build (ubuntu-24.04, gcc-14)	5m 2s
build (macos-13, clang-14)	6m 2s
build (macos-14, armv8-clang-14)	2m 54s
build (windows-2022, msvc-1940)	4m 0s
build-test-downstream (ubuntu-24.04, clang-18)	2m 20s
build-test-downstream (ubuntu-24.04, gcc-14)	2m 14s
build-test-downstream (macos-13, clang-14)	2m 23s
build-test-downstream (macos-14, armv8-clang-14)	1m 58s
build-test-downstream (windows-2022, msvc-1940)	3m 22s
docker (ubuntu-24.04, clang-18)	22s
test (ubuntu-24.04, clang-18)	4m 41s
test (ubuntu-24.04, gcc-14)	4m 40s
test (macos-13, clang-14)	8m 17s
test (macos-14, armv8-clang-14)	4m 19s
	57m 11s

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