fix the number #1496

Job	Run time
macos-latest: clang++ Release Threads	16m 33s
macos-latest: clang++ Release OneTBB	2m 44s
macos-latest: clang++ Release PaRSEC	4m 42s
ubuntu-20.04: /usr/bin/g++-9 Release Threads	28m 59s
ubuntu-20.04: /usr/bin/g++-9 Release OneTBB	1m 50s
ubuntu-20.04: /usr/bin/g++-9 Release PaRSEC	2m 40s
macos-latest: clang++ Debug Threads	15m 15s
macos-latest: clang++ Debug OneTBB	3m 52s
macos-latest: clang++ Debug PaRSEC	2m 50s
ubuntu-20.04: /usr/bin/g++-9 Debug Threads	26m 47s
ubuntu-20.04: /usr/bin/g++-9 Debug OneTBB	1m 58s
ubuntu-20.04: /usr/bin/g++-9 Debug PaRSEC	3m 14s
	1h 51m 24s

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