Bug #1530

Job	Run time
macos-latest: clang++ Release Threads	10m 4s
macos-latest: clang++ Release OneTBB	3m 20s
macos-latest: clang++ Release PaRSEC	3m 24s
ubuntu-20.04: /usr/bin/g++-9 Release Threads	28m 47s
ubuntu-20.04: /usr/bin/g++-9 Release OneTBB	1m 58s
ubuntu-20.04: /usr/bin/g++-9 Release PaRSEC	2m 29s
macos-latest: clang++ Debug Threads	16m 11s
macos-latest: clang++ Debug OneTBB	5m 22s
macos-latest: clang++ Debug PaRSEC	3m 8s
ubuntu-20.04: /usr/bin/g++-9 Debug Threads	28m 44s
ubuntu-20.04: /usr/bin/g++-9 Debug OneTBB	1m 30s
ubuntu-20.04: /usr/bin/g++-9 Debug PaRSEC	1m 39s
	1h 46m 36s

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