TESTING NEEDED: JIT Sparse Function Table, by riperiperi #274

Job	Run time
pr_build / macOS Universal (Debug)	5m 58s
pr_build / win-x64 (Debug)	8m 27s
pr_build / macOS Universal (Release)	5m 55s
pr_build / linux-x64 (Debug)	5m 0s
pr_build / linux-arm64 (Debug)	2m 52s
pr_build / osx-x64 (Debug)	6m 1s
pr_build / win-x64 (Release)	7m 31s
pr_build / linux-x64 (Release)	4m 9s
pr_build / linux-arm64 (Release)	2m 46s
pr_build / osx-x64 (Release)	8m 26s
	57m 5s

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