⚡ Bolt: Optimize hex color parsing and formatting#83
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Replaced string manipulation standard library methods (`substring`, `toLong`, `padStart`, `uppercase`) with manual `CharArray` iterations and bitwise operations in `ThemeExpander.kt` and `TestUtil.kt`. This avoids intermediate object allocations on the heap for hex string conversion, yielding significant performance gains in hot paths where colors are rapidly instantiated. Co-authored-by: himattm <6266621+himattm@users.noreply.github.com>
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💡 What: Replaced string-based hex parsing and formatting with explicit
CharArrayiterations and bitwise arithmetic inThemeExpander.ktandTestUtil.kt.🎯 Why: In Kotlin hot paths, creating substrings or using
.toLong(16)and.toString(16).padStart(6, '0').uppercase()allocates unnecessary intermediateStringobjects, causing memory pressure and GC churn.📊 Impact: Reduces heap allocation and GC pressure during theme parsing and dynamic color scheme generation, resulting in faster multi-color instantiation.
🔬 Measurement: Run unit tests (
./gradlew :halogen-core:testand./gradlew :halogen-image:test) to verify functional equivalence. Profile heap usage during large theme expansions to observe reduced string allocations.PR created automatically by Jules for task 17403143201767071404 started by @himattm