perf: optimize some stuff #724

Job	Run time
feature checks	3m 7s
clippy	1m 19s
docs	59s
fmt	20s
test stable --no-default-features	1m 37s
test stable	1m 14s
test stable --all-features	1m 36s
test beta --no-default-features	1m 21s
test beta	1m 6s
test beta --all-features	1m 24s
test nightly --no-default-features	2m 13s
test nightly	2m 13s
test nightly --all-features	3m 7s
test 1.65 --no-default-features	3m 57s
test 1.65	4m 45s
test 1.65 --all-features	4m 17s
check WASM	30s
	35m 5s

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