JIT

gh-80744: do not read .pdbrc twice when cwd == $home (#136816) #142

Job	Run time
Interpreter (Debug)	10m 53s
JIT with tail calling interpreter (21)	3m 29s
JIT without optimizations (Debug) (21)	12m 53s
Free-Threaded (Debug) (21)	16m 7s
x86_64-pc-windows-msvc/msvc (Debug)	22m 24s
i686-pc-windows-msvc/msvc (Debug)	25m 2s
i686-pc-windows-msvc/msvc (Release)	13m 5s
aarch64-pc-windows-msvc/msvc (Debug)	25m 17s
aarch64-pc-windows-msvc/msvc (Release)	17m 15s
x86_64-pc-windows-msvc/msvc (Release)	13m 25s
x86_64-unknown-linux-gnu/gcc (Release)	8m 32s
aarch64-apple-darwin/clang (Release)	12m 37s
x86_64-apple-darwin/clang (Debug)	28m 37s
aarch64-apple-darwin/clang (Debug)	14m 10s
aarch64-unknown-linux-gnu/gcc (Debug)	8m 25s
x86_64-unknown-linux-gnu/gcc (Debug)	13m 1s
x86_64-apple-darwin/clang (Release)	25m 7s
aarch64-unknown-linux-gnu/gcc (Release)	6m 31s
	4h 36m 50s

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