JIT

GH-128375: Better instrument for `FOR_ITER` #2433

Job	Run time
Interpreter (Debug)	7m 39s
Free-Threaded (Debug) (19)	13m 11s
i686-pc-windows-msvc/msvc (Debug)	18m 6s
i686-pc-windows-msvc/msvc (Release)	11m 4s
x86_64-pc-windows-msvc/msvc (Debug)	17m 21s
x86_64-pc-windows-msvc/msvc (Release)	10m 28s
aarch64-pc-windows-msvc/msvc (Debug)	3m 57s
aarch64-pc-windows-msvc/msvc (Release)	5m 17s
x86_64-apple-darwin/clang (Debug)	12m 0s
x86_64-apple-darwin/clang (Release)	7m 50s
aarch64-apple-darwin/clang (Debug)	9m 27s
aarch64-apple-darwin/clang (Release)	8m 53s
x86_64-unknown-linux-gnu/gcc (Debug)	8m 28s
x86_64-unknown-linux-gnu/gcc (Release)	5m 43s
aarch64-unknown-linux-gnu/gcc (Debug)	7m 29s
aarch64-unknown-linux-gnu/gcc (Release)	6m 42s
	2h 33m 35s

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