perf: minor optimisations

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[codecov]

Codecov Report

Merging #405 (8cb09a9) into main (5715407) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #405      +/-   ##
==========================================
- Coverage   82.68%   82.68%   -0.01%     
==========================================
  Files         264      264              
  Lines       15239    15236       -3     
==========================================
- Hits        12601    12598       -3     
  Misses       2638     2638              

Impacted Files	Coverage Δ
crates/mun_hir/src/resolve.rs	86.08% <100.00%> (+0.12%)	⬆️
crates/mun_hir/src/ty/infer.rs	79.55% <100.00%> (-0.10%)	⬇️
crates/mun_hir/src/ty/infer/place_expr.rs	88.88% <100.00%> (-1.12%)	⬇️

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[baszalmstra]

Thanks! This is much appreciated. Always good to see some quality of life changes!

One comment: can you change your commit messages to follow: https://www.conventionalcommits.org/en/v1.0.0/ . “minor” is not a valid prefix, I think style or perf would be good here.