Improve bounding rect code #2814

Job	Run time
cargo clippy (windows-latest)	5m 3s
cargo check (aarch64-android)	30s
cargo check (msrv) (windows-latest)	1m 49s
cargo clippy (macos-latest)	3m 15s
cargo check (msrv) (wasm32)	23s
cargo check (msrv) (macos-latest)	42s
cargo clippy (ubuntu-latest)	3m 8s
cargo clippy (wasm32)	1m 57s
cargo check (msrv) (ubuntu-latest)	34s
cargo doc	42s
formatting	1m 16s
Prime LFS Cache	4s
cargo miri (unsafe tree_arena)	35s
cargo test (wasm32)	18s
typos	7s
cargo test (windows-latest)	3m 26s
cargo test (macos-latest)	1m 50s
cargo test (ubuntu-latest)	2m 41s
	28m 20s

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