llvm, OptimizationControlMechanism: Reuse costs computed by TransferW… #7923

Job	Run time
select-runner	1s
build (3.7, x64, ubuntu)	1h 14m 41s
build (3.7, x64, windows)	1h 28m 26s
build (3.11, x64, ubuntu)	1h 39m 49s
build (3.11, x64, macos)	1h 12m 10s
build (3.11, x64, windows)	1h 44m 23s
build (3.9, macos, --cov=psyneulink)	1h 45m 27s
build (3.9, ubuntu, --forked -m "not llvm")	45m 1s
build (3.8, x86, windows)	1h 14m 39s
build (3.10, ubuntu, --fp-precision=fp32)	1h 13m 36s
build (3.10, macos, -m benchmark --benchmark-enable --benchmark-only --benchmark-min-rounds=2 --b...	1h 2m 57s
build (3.8, x64, macos)	1h 3m 25s
	14h 24m 35s

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