Doc: Use critical sections for custom types #150

Job	Run time
Interpreter (Debug)	1h 16m 49s
Free-Threaded (Debug)	1h 17m 50s
i686-pc-windows-msvc/msvc (Debug)	17m 58s
i686-pc-windows-msvc/msvc (Release)	6m 35s
x86_64-pc-windows-msvc/msvc (Debug)	17m 2s
x86_64-pc-windows-msvc/msvc (Release)	21m 35s
aarch64-pc-windows-msvc/msvc (Debug)	5m 12s
aarch64-pc-windows-msvc/msvc (Release)	6m 33s
x86_64-apple-darwin/clang (Debug)	1h 21m 40s
x86_64-apple-darwin/clang (Release)	15m 14s
aarch64-apple-darwin/clang (Debug)	9m 8s
aarch64-apple-darwin/clang (Release)	13m 4s
x86_64-unknown-linux-gnu/gcc (Debug)	7m 48s
x86_64-unknown-linux-gnu/gcc (Release)	17m 50s
x86_64-unknown-linux-gnu/clang (Debug)	7m 52s
x86_64-unknown-linux-gnu/clang (Release)	14m 6s
aarch64-unknown-linux-gnu/gcc (Debug)	1h 15m 2s
aarch64-unknown-linux-gnu/gcc (Release)	36m 30s
aarch64-unknown-linux-gnu/clang (Debug)	1h 9m 43s
aarch64-unknown-linux-gnu/clang (Release)	37m 46s
	10h 15m 17s

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