Add more test files for performance. #576

Job	Run time
Rust check	18s
Rust format	15s
Rust test	49s
Rust check with default features	19s
Rust lint (stable)	16s
Rust lint	19s
Rust lint (beta)	18s
Rust check (macos-latest)	52s
Rust check (windows-latest)	47s
Rust doc	39s
Rust lint (nightly)	44s
	5m 36s

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