perf: faster case-sensitive string comparison for MQ browser hacks

[bartveneman]

No description provided.

[codspeed-hq]

CodSpeed Performance Report

Merging #420 will degrade performances by 51.39%

_{Comparing perf/fast-mq-hack-checks (fa48375) with master (b78077d)}

Summary

❌ 4 regressions
✅ 3 untouched benchmarks

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Benchmarks breakdown

	Benchmark	master	perf/fast-mq-hack-checks	Change
❌	color names	575.6 µs	861.6 µs	-33.19%
❌	font shorthand	489.7 µs	548.4 µs	-10.71%
❌	slice of Syntax.fm	5.3 ms	7.4 ms	-28.96%
❌	slice of nerdy.dev	7 ms	14.4 ms	-51.39%

[codecov-commenter]

Bundle Report

Changes will decrease total bundle size by 25 bytes ⬇️

Bundle name	Size	Change
analyzeCss-analyzeCss-esm	99.36kB	8 bytes ⬇️
analyzeCss-analyzeCss-esm-analyzeCss-umd	68.2kB	17 bytes ⬇️