perf(visit): Add #[inline]

[kdy1]

Description:

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Latest commit: b8c17ac

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[codspeed-hq]

CodSpeed Performance Report

Merging #9302 will degrade performances by 6.41%

_{Comparing kdy1:minifier-alloc (b8c17ac) with main (27ca712)}

Summary

⚡ 2 improvements
❌ 4 regressions
✅ 172 untouched benchmarks

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

Benchmarks breakdown

	Benchmark	main	kdy1:minifier-alloc	Change
❌	es/visitor/base-perf/boxing_boxed	3.2 µs	3.4 µs	-3.47%
❌	es/visitor/base-perf/boxing_boxed_clone	2.3 µs	2.4 µs	-4.78%
❌	es/visitor/base-perf/boxing_unboxed	3.4 µs	3.6 µs	-6.41%
❌	es/visitor/base-perf/boxing_unboxed_clone	2.6 µs	2.7 µs	-3.28%
⚡	html/document_fragment/visitor/compare/fold_span	1.3 ms	1.2 ms	+4.22%
⚡	html/document_fragment/visitor/compare/fold_span_panic	1.3 ms	1.2 ms	+4.44%