Use static field names for min_max return value and dtype

[AdamGS]

No description provided.

[codspeed-hq]

CodSpeed Performance Report

Merging this PR will improve performance by 14.63%

_{Comparing adamg/static-field-names-fns (d624f1b) with develop (49cf3aa)}

Summary

⚡ 4 improved benchmarks
✅ 1250 untouched benchmarks
⏩ 1254 skipped benchmarks¹

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
⚡	Memory	compress[(1000, 256)]	2.2 KB	1.9 KB	+14.63%
⚡	Memory	compress[(100000, 4096)]	2.9 KB	2.6 KB	+10.91%
⚡	Memory	compress[(10000, 1024)]	2.3 KB	2 KB	+13.95%
⚡	Memory	compress[(10000, 256)]	2.9 KB	2.6 KB	+10.91%

Footnotes

1. 1254 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.87%. Comparing base (86b3d02) to head (d624f1b).
⚠️ Report is 5 commits behind head on develop.

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[AdamGS]

the codspeed improvements seem possible, min/max is used in a bunch of places in the compressor