JIT

gh-112087: Update list_get_item_ref to optimistically avoid locking (… #4

Job	Run time
i686-pc-windows-msvc/msvc (Debug)	16m 49s
i686-pc-windows-msvc/msvc (Release)	20m 33s
x86_64-pc-windows-msvc/msvc (Debug)	17m 45s
x86_64-pc-windows-msvc/msvc (Release)	19m 4s
aarch64-pc-windows-msvc/msvc (Debug)	4m 42s
aarch64-pc-windows-msvc/msvc (Release)	6m 21s
x86_64-apple-darwin/clang (Debug)	10m 24s
x86_64-apple-darwin/clang (Release)	14m 44s
aarch64-apple-darwin/clang (Debug)	8m 29s
aarch64-apple-darwin/clang (Release)	12m 28s
x86_64-unknown-linux-gnu/gcc (Debug)	7m 28s
x86_64-unknown-linux-gnu/gcc (Release)	17m 35s
x86_64-unknown-linux-gnu/clang (Debug)	7m 33s
x86_64-unknown-linux-gnu/clang (Release)	13m 36s
aarch64-unknown-linux-gnu/gcc (Debug)	56m 27s
aarch64-unknown-linux-gnu/gcc (Release)	46m 17s
aarch64-unknown-linux-gnu/clang (Debug)	52m 16s
aarch64-unknown-linux-gnu/clang (Release)	31m 16s
	6h 3m 47s

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