build

Improve performance and memory usage #170

Job	Run time
build (stable, --features "")	43s
codecov	2m 39s
fmt	38s
build (stable, --all-features)	2m 6s
clippy	1m 4s
build (stable, --no-default-features)	59s
build (1.71, --features "")	1m 33s
build (1.71, --all-features)	2m 2s
test	2m 14s
build (1.71, --no-default-features)	39s
build (beta, --features "")	44s
build (beta, --all-features)	2m 21s
build (beta, --no-default-features)	45s
build (nightly, --features "")	1m 2s
build (nightly, --all-features)	2m 11s
build (nightly, --no-default-features)	30s
	22m 10s

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