more interations + kain #1484

Job	Run time
macos-latest: clang++ Release Threads	31m 22s
macos-latest: clang++ Release OneTBB	3m 58s
macos-latest: clang++ Release PaRSEC	5m 31s
ubuntu-20.04: /usr/bin/g++-9 Release Threads	44m 46s
ubuntu-20.04: /usr/bin/g++-9 Release OneTBB	2m 14s
ubuntu-20.04: /usr/bin/g++-9 Release PaRSEC	2m 36s
macos-latest: clang++ Debug Threads	24m 13s
macos-latest: clang++ Debug OneTBB	4m 48s
macos-latest: clang++ Debug PaRSEC	4m 6s
ubuntu-20.04: /usr/bin/g++-9 Debug Threads	44m 51s
ubuntu-20.04: /usr/bin/g++-9 Debug OneTBB	2m 36s
ubuntu-20.04: /usr/bin/g++-9 Debug PaRSEC	2m 31s
	2h 53m 32s

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