print statements for debugging #1538

Job	Run time
macos-latest: clang++ Release Threads	12m 0s
macos-latest: clang++ Release OneTBB	2m 22s
macos-latest: clang++ Release PaRSEC	3m 11s
ubuntu-20.04: /usr/bin/g++-9 Release Threads	30m 19s
ubuntu-20.04: /usr/bin/g++-9 Release OneTBB	1m 55s
ubuntu-20.04: /usr/bin/g++-9 Release PaRSEC	2m 12s
macos-latest: clang++ Debug Threads	16m 3s
macos-latest: clang++ Debug OneTBB	5m 9s
macos-latest: clang++ Debug PaRSEC	4m 26s
ubuntu-20.04: /usr/bin/g++-9 Debug Threads	29m 57s
ubuntu-20.04: /usr/bin/g++-9 Debug OneTBB	1m 34s
ubuntu-20.04: /usr/bin/g++-9 Debug PaRSEC	1m 47s
	1h 50m 55s

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