introduced size_of #1314

Job	Run time
macos-latest: clang++ Release Pthreads	12m 50s
macos-latest: clang++ Release PaRSEC	15m 23s
macos-latest: clang++ Debug Pthreads	12m 36s
macos-latest: clang++ Debug PaRSEC	11m 42s
ubuntu-24.04: /usr/bin/g++-14 Release Pthreads	24m 49s
ubuntu-24.04: /usr/bin/g++-14 Release PaRSEC	27m 2s
ubuntu-24.04: /usr/bin/g++-14 Debug Pthreads	20m 43s
ubuntu-24.04: /usr/bin/g++-14 Debug PaRSEC	23m 38s
	2h 28m 43s

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