JIT

Make _abc module thread-safe #33

Job	Run time
i686-pc-windows-msvc/msvc (Debug)	19m 57s
i686-pc-windows-msvc/msvc (Release)	23m 23s
x86_64-pc-windows-msvc/msvc (Debug)	17m 42s
x86_64-pc-windows-msvc/msvc (Release)	22m 15s
aarch64-pc-windows-msvc/msvc (Debug)	4m 51s
aarch64-pc-windows-msvc/msvc (Release)	5m 46s
x86_64-apple-darwin/clang (Debug)	10m 21s
x86_64-apple-darwin/clang (Release)	15m 4s
aarch64-apple-darwin/clang (Debug)	8m 48s
aarch64-apple-darwin/clang (Release)	12m 26s
x86_64-unknown-linux-gnu/gcc (Debug)	7m 47s
x86_64-unknown-linux-gnu/gcc (Release)	17m 38s
x86_64-unknown-linux-gnu/clang (Debug)	7m 40s
x86_64-unknown-linux-gnu/clang (Release)	14m 11s
aarch64-unknown-linux-gnu/gcc (Debug)	1h 1m 0s
aarch64-unknown-linux-gnu/gcc (Release)	47m 56s
aarch64-unknown-linux-gnu/clang (Debug)	55m 36s
aarch64-unknown-linux-gnu/clang (Release)	31m 32s
	6h 23m 53s

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