JIT

Reference implementation for PEP 828 #5470

Job	Run time
Interpreter (Debug)	12m 22s
x86_64-apple-darwin/clang (Debug)	36m 36s
JIT without optimizations (Debug)	3m 32s
JIT with tail calling interpreter	3m 58s
Free-Threaded (Debug)	3m 35s
aarch64-unknown-linux-gnu/gcc (Debug)	9m 20s
x86_64-unknown-linux-gnu/gcc (Release)	8m 28s
i686-pc-windows-msvc/msvc (Release)	19m 21s
aarch64-apple-darwin/clang (Release)	11m 9s
aarch64-apple-darwin/clang (Debug)	12m 31s
x86_64-apple-darwin/clang (Release)	24m 13s
aarch64-unknown-linux-gnu/gcc (Release)	7m 5s
aarch64-pc-windows-msvc/msvc (Release)	11m 12s
i686-pc-windows-msvc/msvc (Debug)	44m 36s
x86_64-unknown-linux-gnu/gcc (Debug)	12m 30s
x86_64-pc-windows-msvc/msvc (Release)	9m 28s
aarch64-pc-windows-msvc/msvc (Debug)	44m 38s
x86_64-pc-windows-msvc/msvc (Debug)	44m 35s
	5h 19m 9s

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