various improvements #5601

Job	Run time
pure-rust-build	1m 58s
test-fixtures-windows	14m 52s
cargo-deny	28s
cargo-deny-advisories	31s
check-packetline (ubuntu-latest)	8s
lint	3m 38s
test	11m 1s
test-32bit (i386)	5m 58s
test-journey	4m 0s
test-fast (windows-latest)	14m 19s
test-32bit (arm32v7)	4m 6s
WebAssembly (wasm32-unknown-unknown)	1m 1s
test-fast (macos-latest)	3m 40s
WebAssembly (wasm32-wasip1)	49s
test-fast (ubuntu-latest)	3m 57s
test-fast (ubuntu-22.04-arm)	4m 8s
check-blocking	3s
Tests pass	1s
	1h 14m 38s

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