Macro `bench_specializations` #565

Job	Run time
check format	6s
msrv	1m 59s
check	10s
test	1m 31s
check (--no-default-features)	10s
check (--no-default-features --features use_alloc)	13s
check (--all-targets --all-features)	22s
All checks succeeded	1s
	4m 32s

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