Macro `bench_specializations` #557

Job	Run time
check format	12s
check	17s
msrv	1m 34s
test	1m 41s
check (--no-default-features)	13s
check (--no-default-features --features use_alloc)	27s
check (--all-targets --all-features)	33s
All checks succeeded	1s
	4m 58s

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