JIT

DO NOT MERGE - Enable thread-unsafe FOR_ITER #140

Job	Run time
Interpreter (Debug)	7m 44s
Free-Threaded (Debug) (19)	11m 40s
i686-pc-windows-msvc/msvc (Debug)	17m 53s
i686-pc-windows-msvc/msvc (Release)	11m 7s
x86_64-pc-windows-msvc/msvc (Debug)	18m 10s
x86_64-pc-windows-msvc/msvc (Release)	11m 31s
aarch64-pc-windows-msvc/msvc (Debug)	4m 2s
aarch64-pc-windows-msvc/msvc (Release)	6m 47s
x86_64-apple-darwin/clang (Debug)	1h 21m 11s
x86_64-apple-darwin/clang (Release)	11m 16s
aarch64-apple-darwin/clang (Debug)	9m 23s
aarch64-apple-darwin/clang (Release)	9m 31s
x86_64-unknown-linux-gnu/gcc (Debug)	8m 28s
x86_64-unknown-linux-gnu/gcc (Release)	6m 48s
aarch64-unknown-linux-gnu/gcc (Debug)	10s
aarch64-unknown-linux-gnu/gcc (Release)	9s
	3h 35m 50s

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