JIT

GH-128375: Better instrument for `FOR_ITER` #2430

Job	Run time
Interpreter (Debug)	7m 37s
Free-Threaded (Debug) (19)	12m 46s
i686-pc-windows-msvc/msvc (Debug)	18m 19s
i686-pc-windows-msvc/msvc (Release)	10m 7s
x86_64-pc-windows-msvc/msvc (Debug)	17m 14s
x86_64-pc-windows-msvc/msvc (Release)	10m 13s
aarch64-pc-windows-msvc/msvc (Debug)	4m 51s
aarch64-pc-windows-msvc/msvc (Release)	6m 15s
x86_64-apple-darwin/clang (Debug)	16m 10s
x86_64-apple-darwin/clang (Release)	9m 25s
aarch64-apple-darwin/clang (Debug)	8m 43s
aarch64-apple-darwin/clang (Release)	9m 10s
x86_64-unknown-linux-gnu/gcc (Debug)	8m 31s
x86_64-unknown-linux-gnu/gcc (Release)	5m 37s
aarch64-unknown-linux-gnu/gcc (Debug)	8m 16s
aarch64-unknown-linux-gnu/gcc (Release)	6m 25s
	2h 39m 39s

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