build

Improve performance and memory usage #173

Job	Run time
codecov	2m 27s
fmt	29s
clippy	1m 14s
build (stable, --features "")	43s
build (stable, --all-features)	1m 49s
build (stable, --no-default-features)	38s
test	3m 2s
build (1.71, --features "")	53s
build (1.71, --all-features)	1m 58s
build (1.71, --no-default-features)	55s
build (beta, --features "")	55s
build (beta, --all-features)	1m 58s
build (beta, --no-default-features)	47s
build (nightly, --features "")	53s
build (nightly, --all-features)	1m 56s
build (nightly, --no-default-features)	51s
	21m 28s

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