JIT

gh-142889: Improve layout of dictionary keys #6707

Job	Run time
aarch64-unknown-linux-gnu/gcc (Debug)	9m 42s
x86_64-unknown-linux-gnu/gcc (Release)	9m 30s
Interpreter (Debug)	14m 2s
x86_64-unknown-linux-gnu/gcc (Debug)	14m 18s
JIT with tail calling interpreter	4m 44s
JIT without optimizations (Debug)	3m 45s
Free-Threaded (Debug)	4m 3s
aarch64-unknown-linux-gnu/gcc (Release)	7m 10s
i686-pc-windows-msvc/msvc (Debug)	20m 25s
x86_64-pc-windows-msvc/msvc (Debug)	30m 56s
x86_64-apple-darwin/clang (Release)	33m 7s
aarch64-apple-darwin/clang (Debug)	15m 46s
x86_64-pc-windows-msvc/msvc (Release)	15m 57s
aarch64-pc-windows-msvc/msvc (Debug)	24m 53s
aarch64-apple-darwin/clang (Release)	11m 21s
i686-pc-windows-msvc/msvc (Release)	15m 50s
x86_64-apple-darwin/clang (Debug)	31m 40s
aarch64-pc-windows-msvc/msvc (Release)	17m 25s
	4h 44m 34s

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