JIT

GH-128939: Refactor JIT optimize structs #2531

Job	Run time
Interpreter (Debug)	7m 37s
Free-Threaded (Debug) (19)	12m 21s
i686-pc-windows-msvc/msvc (Debug)	17m 27s
i686-pc-windows-msvc/msvc (Release)	12m 2s
x86_64-pc-windows-msvc/msvc (Debug)	18m 19s
x86_64-pc-windows-msvc/msvc (Release)	11m 10s
aarch64-pc-windows-msvc/msvc (Debug)	5m 1s
aarch64-pc-windows-msvc/msvc (Release)	6m 19s
x86_64-apple-darwin/clang (Debug)	15m 10s
x86_64-apple-darwin/clang (Release)	12m 49s
aarch64-apple-darwin/clang (Debug)	10m 14s
aarch64-apple-darwin/clang (Release)	9m 14s
x86_64-unknown-linux-gnu/gcc (Debug)	8m 53s
x86_64-unknown-linux-gnu/gcc (Release)	5m 40s
aarch64-unknown-linux-gnu/gcc (Debug)	8m 37s
aarch64-unknown-linux-gnu/gcc (Release)	6m 16s
	2h 47m 9s

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