JIT

GH-128375: Better instrument for `FOR_ITER` #2432

Job	Run time
Interpreter (Debug)	7m 47s
Free-Threaded (Debug) (19)	11m 58s
i686-pc-windows-msvc/msvc (Debug)	11m 37s
i686-pc-windows-msvc/msvc (Release)	10m 58s
x86_64-pc-windows-msvc/msvc (Debug)	11m 42s
x86_64-pc-windows-msvc/msvc (Release)	10m 46s
aarch64-pc-windows-msvc/msvc (Debug)	5m 27s
aarch64-pc-windows-msvc/msvc (Release)	6m 19s
x86_64-apple-darwin/clang (Debug)	12m 1s
x86_64-apple-darwin/clang (Release)	8m 38s
aarch64-apple-darwin/clang (Debug)	8m 50s
aarch64-apple-darwin/clang (Release)	11m 1s
x86_64-unknown-linux-gnu/gcc (Debug)	8m 27s
x86_64-unknown-linux-gnu/gcc (Release)	6m 45s
aarch64-unknown-linux-gnu/gcc (Debug)	8m 44s
aarch64-unknown-linux-gnu/gcc (Release)	8m 46s
	2h 29m 46s

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