optimize header operations

[acoshift]

No description provided.

[codecov]

Codecov Report

Patch coverage: 59.52% and project coverage change: -0.54 ⚠️

Comparison is base (528300c) 69.82% compared to head (e4d9004) 69.29%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #144      +/-   ##
==========================================
- Coverage   69.82%   69.29%   -0.54%     
==========================================
  Files          55       56       +1     
  Lines        2005     2045      +40     
==========================================
+ Hits         1400     1417      +17     
- Misses        553      570      +17     
- Partials       52       58       +6     

Impacted Files	Coverage Δ
pkg/authn/forward.go	68.81% <37.50%> (-4.75%)	⬇️
pkg/internal/header/header.go	46.15% <46.15%> (ø)
pkg/compress/compress.go	61.32% <66.66%> (+1.14%)	⬆️
pkg/authn/authn.go	100.00% <100.00%> (ø)
pkg/authn/basic.go	100.00% <100.00%> (ø)
pkg/headers/map.go	100.00% <100.00%> (ø)
pkg/hsts/hsts.go	100.00% <100.00%> (ø)
pkg/logger/logger.go	56.04% <100.00%> (ø)
pkg/logger/record.go	71.69% <100.00%> (ø)
pkg/ratelimit/ratelimit.go	66.66% <100.00%> (ø)
... and 5 more

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