JIT

gh-142889: Restructure PyDictKeysObject memory layout for simpler access #5479

Job	Run time
Interpreter (Debug)	11m 49s
x86_64-apple-darwin/clang (Release)	26m 55s
aarch64-apple-darwin/clang (Debug)	15m 12s
Free-Threaded (Debug)	3m 39s
aarch64-unknown-linux-gnu/gcc (Debug)	9m 3s
x86_64-unknown-linux-gnu/gcc (Debug)	13m 5s
aarch64-unknown-linux-gnu/gcc (Release)	7m 15s
JIT without optimizations (Debug)	3m 48s
JIT with tail calling interpreter	4m 32s
x86_64-unknown-linux-gnu/gcc (Release)	8m 25s
x86_64-pc-windows-msvc/msvc (Release)	15m 14s
aarch64-apple-darwin/clang (Release)	11m 33s
x86_64-apple-darwin/clang (Debug)	32m 48s
aarch64-pc-windows-msvc/msvc (Release)	17m 27s
x86_64-pc-windows-msvc/msvc (Debug)	27m 7s
i686-pc-windows-msvc/msvc (Debug)	25m 13s
i686-pc-windows-msvc/msvc (Release)	15m 9s
aarch64-pc-windows-msvc/msvc (Debug)	24m 33s
	4h 32m 47s

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