perf: minor performance optimization for escape/unescape

[fredbi]

Change type

Please select: 🆕 New feature or enhancement|🔧 Bug fix'|📃 Documentation update

Short description

Fixes

Full description

Checklist

• I have signed all my commits with my name and email (see DCO. This does not require a PGP-signed commit
• I have rebased and squashed my work, so only one commit remains
• I have added tests to cover my changes.
• I have properly enriched go doc comments in code.
• I have properly documented any breaking change.

[codecov]

Codecov Report

❌ Patch coverage is 60.00000% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 69.79%. Comparing base (ea42106) to head (8f78758).
⚠️ Report is 5 commits behind head on master.

Files with missing lines	Patch %	Lines
pointer.go	60.00%	0 Missing and 4 partials ⚠️

❌ Your patch status has failed because the patch coverage (60.00%) is below the target coverage (80.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #59      +/-   ##
==========================================
- Coverage   70.40%   69.79%   -0.61%     
==========================================
  Files           2        2              
  Lines         348      341       -7     
==========================================
- Hits          245      238       -7     
  Misses         78       78              
  Partials       25       25              

Flag	Coverage Δ
oldstable-macos-latest	69.79% <60.00%> (-0.61%)	⬇️
oldstable-ubuntu-latest	69.79% <60.00%> (-0.61%)	⬇️
oldstable-windows-latest	69.79% <60.00%> (-0.61%)	⬇️
stable-macos-latest	69.79% <60.00%> (-0.61%)	⬇️
stable-ubuntu-latest	69.79% <60.00%> (-0.61%)	⬇️
stable-windows-latest	69.79% <60.00%> (-0.61%)	⬇️

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