Improve performance of `pdbx.compress()`

[codspeed-hq[bot]]

CodSpeed Performance Report

Merging #677 will improve performances by 43.35%

_{Comparing padix-key:compress-performance (446ad0a) with main (4ca6318)}

Summary

⚡ 1 improvements ✅ 44 untouched benchmarks

Benchmarks breakdown

	Benchmark	main	padix-key:compress-performance	Change
⚡	benchmark_compress	721.7 ms	503.5 ms	+43.35%

[padix-key]

Thanks for spotting the typos.