use CompositeFactory with vectors of functions #1591

Job	Run time
macos-latest: clang++ Release Threads	35m 46s
macos-latest: clang++ Release OneTBB	3m 21s
macos-latest: clang++ Release PaRSEC	4m 35s
ubuntu-20.04: /usr/bin/g++-9 Release Threads	32m 1s
ubuntu-20.04: /usr/bin/g++-9 Release OneTBB	1m 47s
ubuntu-20.04: /usr/bin/g++-9 Release PaRSEC	1m 50s
macos-latest: clang++ Debug Threads	28m 35s
macos-latest: clang++ Debug OneTBB	3m 29s
macos-latest: clang++ Debug PaRSEC	4m 4s
ubuntu-20.04: /usr/bin/g++-9 Debug Threads	45m 9s
ubuntu-20.04: /usr/bin/g++-9 Debug OneTBB	1m 45s
ubuntu-20.04: /usr/bin/g++-9 Debug PaRSEC	2m 3s
	2h 44m 25s

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