use CompositeFactory with vectors of functions #1593

Job	Run time
macos-latest: clang++ Release Threads	15m 10s
macos-latest: clang++ Release OneTBB	3m 32s
macos-latest: clang++ Release PaRSEC	4m 21s
ubuntu-20.04: /usr/bin/g++-9 Release Threads	16m 19s
ubuntu-20.04: /usr/bin/g++-9 Release OneTBB	1m 29s
ubuntu-20.04: /usr/bin/g++-9 Release PaRSEC	1m 53s
macos-latest: clang++ Debug Threads	37m 47s
macos-latest: clang++ Debug OneTBB	2m 41s
macos-latest: clang++ Debug PaRSEC	4m 13s
ubuntu-20.04: /usr/bin/g++-9 Debug Threads	31m 36s
ubuntu-20.04: /usr/bin/g++-9 Debug OneTBB	2m 1s
ubuntu-20.04: /usr/bin/g++-9 Debug PaRSEC	1m 48s
	2h 2m 50s

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