various improvements #5532

Job	Run time
pure-rust-build	2m 5s
test	10m 37s
test-fast (windows-latest)	16m 16s
test-journey	4m 14s
test-fast (macos-latest)	3m 42s
cargo-deny	31s
test-fast (ubuntu-latest)	3m 42s
cargo-deny-advisories	31s
lint	3m 52s
test-32bit (i386)	5m 45s
test-fast-arm	3m 45s
test-fixtures-windows	15m 0s
test-32bit (arm32v7)	4m 16s
check-blocking	6s
check-packetline (ubuntu-latest)	9s
WebAssembly (wasm32-unknown-unknown)	1m 13s
WebAssembly (wasm32-wasip1)	40s
Tests pass	1s
	1h 16m 25s

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