Decoder improvements #4771

Job	Run time
Ensure `Cargo.lock` contains all required dependencies	7s
toolchains	2s
check (ubuntu-latest, 1.76.0, debug)	3m 11s
check (ubuntu-latest, stable, debug)	3m 52s
check (ubuntu-latest, nightly, debug)	3m 6s
check (macos-latest, 1.76.0, debug)	1m 53s
check (macos-latest, stable, debug)	2m 28s
check (macos-latest, nightly, debug)	1m 45s
check (windows-latest, 1.76.0, debug)	6m 7s
check (windows-latest, stable, debug)	8m 23s
check (windows-latest, nightly, debug)	6m 59s
check (ubuntu-latest, stable, release)	3m 17s
bench	0s
	41m 10s

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