various improvements #5490

Job	Run time
pure-rust-build	2m 3s
test	10m 27s
cargo-deny-advisories	26s
cargo-deny	30s
lint	3m 52s
test-32bit	5m 32s
test-fast (windows-latest)	14m 10s
test-32bit-cross (armv7-linux-androideabi)	1m 12s
test-fast (macos-latest)	3m 33s
test-fixtures-windows	14m 36s
test-journey	4m 0s
test-fast (ubuntu-latest)	3m 44s
WebAssembly (wasm32-unknown-unknown)	1m 10s
WebAssembly (wasm32-wasip1)	43s
check-blocking	3s
check-packetline (ubuntu-latest)	5s
Tests pass	1s
	1h 6m 7s

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