JIT

gh-145742: Manually emit _LOAD_FAST_BORROW to reduce stencil bloat #6083

Job	Run time
aarch64-unknown-linux-gnu/gcc (Debug)	8m 38s
aarch64-unknown-linux-gnu/gcc (Release)	6m 55s
Interpreter (Debug)	12m 17s
JIT without optimizations (Debug)	3m 38s
x86_64-unknown-linux-gnu/gcc (Debug)	14m 21s
JIT with tail calling interpreter	4m 36s
x86_64-unknown-linux-gnu/gcc (Release)	9m 11s
i686-pc-windows-msvc/msvc (Release)	15m 2s
x86_64-pc-windows-msvc/msvc (Debug)	25m 10s
x86_64-pc-windows-msvc/msvc (Release)	15m 5s
aarch64-pc-windows-msvc/msvc (Release)	17m 1s
Free-Threaded (Debug)	3m 25s
i686-pc-windows-msvc/msvc (Debug)	29m 11s
aarch64-pc-windows-msvc/msvc (Debug)	26m 44s
aarch64-apple-darwin/clang (Debug)	13m 17s
x86_64-apple-darwin/clang (Release)	19m 56s
x86_64-apple-darwin/clang (Debug)	33m 10s
aarch64-apple-darwin/clang (Release)	13m 28s
	4h 31m 5s

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