JIT

GH-128939: Refactor JIT optimize structs #2535

Job	Run time
Interpreter (Debug)	7m 40s
Free-Threaded (Debug) (19)	12m 41s
i686-pc-windows-msvc/msvc (Debug)	18m 24s
i686-pc-windows-msvc/msvc (Release)	11m 3s
x86_64-pc-windows-msvc/msvc (Debug)	17m 18s
x86_64-pc-windows-msvc/msvc (Release)	10m 42s
aarch64-pc-windows-msvc/msvc (Debug)	5m 41s
aarch64-pc-windows-msvc/msvc (Release)	5m 33s
x86_64-apple-darwin/clang (Debug)	11m 28s
x86_64-apple-darwin/clang (Release)	10m 31s
aarch64-apple-darwin/clang (Debug)	9m 54s
aarch64-apple-darwin/clang (Release)	8m 45s
x86_64-unknown-linux-gnu/gcc (Debug)	9m 13s
x86_64-unknown-linux-gnu/gcc (Release)	5m 43s
aarch64-unknown-linux-gnu/gcc (Debug)	12m 9s
aarch64-unknown-linux-gnu/gcc (Release)	5m 51s
	2h 42m 36s

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