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⚡ Bolt: Optimize HintExtractor by replacing multiple regexes with a single pass loop#71

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⚡ Bolt: Optimize HintExtractor by replacing multiple regexes with a single pass loop#71
himattm wants to merge 1 commit into
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bolt/optimize-hint-extractor-14945420773654845847

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@himattm himattm commented Jun 3, 2026

💡 What: Replaced multiple string-manipulating regular expressions in HintExtractor.kt with a single manual character iteration loop and a StringBuilder.

🎯 Why: In Kotlin hot paths, relying on multiple regular expressions (e.g., lookarounds for camel case, format validation, whitespace normalization) introduces significant overhead due to state machine compilation and backtracking.

📊 Impact: Reduces CPU cycles and memory allocations significantly during hint extraction by avoiding multiple regex state machine compilations and backtracking overhead, leading to faster execution times.

🔬 Measurement: Run ./gradlew :halogen-engine:test to verify that the extraction logic remains perfectly correct. Profile the execution of HintExtractor.extract to observe the reduced allocation rate and CPU time.


PR created automatically by Jules for task 14945420773654845847 started by @himattm

Replaced multiple string-manipulating regular expressions (lookarounds for camel case, format validation, whitespace normalization) with a single manual character iteration loop and a StringBuilder. This avoids significant compilation and backtracking overhead from the Regex state machine in this hot path.

Co-authored-by: himattm <6266621+himattm@users.noreply.github.com>
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himattm commented Jun 6, 2026

Closing this in favor of #74, which curates the parser hot-path changes without the generated .jules/bolt.md metadata and covers the duplicate HintExtractor/SchemaParser optimization work in one PR.

@himattm himattm closed this Jun 6, 2026
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Closing this in favor of #74, which curates the parser hot-path changes without the generated .jules/bolt.md metadata and covers the duplicate HintExtractor/SchemaParser optimization work in one PR.

Understood. Acknowledging that this work is now obsolete and stopping work on this task.

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