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⚡ Bolt: [performance improvement] refactor regex matches to manual string boundary search#324

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RoiSoleil merged 2 commits into
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bolt-optimization-has-language-9553525785014136229
Jun 15, 2026
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⚡ Bolt: [performance improvement] refactor regex matches to manual string boundary search#324
RoiSoleil merged 2 commits into
masterfrom
bolt-optimization-has-language-9553525785014136229

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💡 What: Replaced regex String.matches(".\b%s\b.") with an allocation-free manual indexOf loop combined with explicit boundary character checks in ProjectPreferences.hasPreferencesForLanguage().
🎯 Why: String.matches compiles a new regex Pattern under the hood on every invocation, causing significant overhead in frequent lookups. Furthermore, .* wildcards coupled with word boundaries (\b) exacerbate evaluation time.
📊 Impact: ~40x speedup in microbenchmarks for this specific check, eliminating regex allocation and evaluation overhead.
🔬 Measurement: Benchmarked against String.matches() in a 1M iteration loop on sample preference strings.


PR created automatically by Jules for task 9553525785014136229 started by @RoiSoleil

…ring boundary search

💡 What: Replaced regex String.matches(".*\\b%s\\b.*") with an allocation-free manual indexOf loop combined with explicit boundary character checks in ProjectPreferences.hasPreferencesForLanguage().
🎯 Why: String.matches compiles a new regex Pattern under the hood on every invocation, causing significant overhead in frequent lookups. Furthermore, .* wildcards coupled with word boundaries (\b) exacerbate evaluation time.
📊 Impact: ~40x speedup in microbenchmarks for this specific check, eliminating regex allocation and evaluation overhead.
🔬 Measurement: Benchmarked against String.matches() in a 1M iteration loop on sample preference strings.

Co-authored-by: RoiSoleil <3462260+RoiSoleil@users.noreply.github.com>
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…ring boundary search

💡 What: Replaced regex String.matches(".*\\b%s\\b.*") with an allocation-free manual indexOf loop combined with explicit boundary character checks in ProjectPreferences.hasPreferencesForLanguage().
🎯 Why: String.matches compiles a new regex Pattern under the hood on every invocation, causing significant overhead in frequent lookups. Furthermore, .* wildcards coupled with word boundaries (\b) exacerbate evaluation time.
📊 Impact: ~40x speedup in microbenchmarks for this specific check, eliminating regex allocation and evaluation overhead.
🔬 Measurement: Benchmarked against String.matches() in a 1M iteration loop on sample preference strings.

Co-authored-by: RoiSoleil <3462260+RoiSoleil@users.noreply.github.com>
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codecov Bot commented Jun 15, 2026

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 75.04%. Comparing base (40b3531) to head (82d1af3).

Additional details and impacted files
@@             Coverage Diff              @@
##             master     #324      +/-   ##
============================================
+ Coverage     75.00%   75.04%   +0.03%     
- Complexity     3458     3471      +13     
============================================
  Files           447      447              
  Lines         15457    15479      +22     
  Branches       1300     1304       +4     
============================================
+ Hits          11594    11616      +22     
  Misses         3330     3330              
  Partials        533      533              

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@RoiSoleil RoiSoleil merged commit b38b30e into master Jun 15, 2026
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