JIT

GH-148726: Forward-port generational GC. #6271

Job	Run time
Interpreter (Debug)	11m 46s
Free-Threaded (Debug)	3m 26s
aarch64-apple-darwin/clang (Debug)	19m 32s
JIT with tail calling interpreter	4m 1s
x86_64-apple-darwin/clang (Release)	27m 46s
x86_64-unknown-linux-gnu/gcc (Release)	9m 0s
x86_64-pc-windows-msvc/msvc (Release)	15m 25s
JIT without optimizations (Debug)	3m 47s
i686-pc-windows-msvc/msvc (Release)	13m 19s
x86_64-unknown-linux-gnu/gcc (Debug)	14m 52s
aarch64-unknown-linux-gnu/gcc (Release)	7m 4s
aarch64-apple-darwin/clang (Release)	12m 4s
x86_64-pc-windows-msvc/msvc (Debug)	21m 18s
aarch64-pc-windows-msvc/msvc (Release)	18m 39s
aarch64-unknown-linux-gnu/gcc (Debug)	9m 10s
x86_64-apple-darwin/clang (Debug)	39m 41s
aarch64-pc-windows-msvc/msvc (Debug)	27m 8s
i686-pc-windows-msvc/msvc (Debug)	25m 14s
	4h 43m 12s

Provide feedback