⚡ Bolt: Replace char_indices with byte iteration in normalize_expression - #15
⚡ Bolt: Replace char_indices with byte iteration in normalize_expression#15SayanthRock wants to merge 1 commit into
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💡 What: Replaced the
.char_indices().peekable()iterator innormalize_expressionwith direct byte-level iteration, falling back to full UTF-8 decoding only when encountering non-ASCII bytes.🎯 Why: In hot string parsing loops where the majority of characters are ASCII (like SQL expressions),
.char_indices()introduces noticeable performance overhead because it performs UTF-8 validation and decoding for every single character.📊 Impact: Reduces the parsing overhead for normal ASCII characters to simple byte casting and increments, completely skipping standard UTF-8 processing in the hot path. Operator peeking (
!=,==) now also uses zero-cost byte array lookups instead of iterator peaking.🔬 Measurement: Expected measurable reduction in time spent within
normalize_expressionfor large or repeated queries. You can verify the behavior hasn't changed by runningcargo test --workspace(which continues to pass) because multi-byte Unicode characters are still safely decoded when encountered.PR created automatically by Jules for task 18254843568297997185 started by @SayanthRock
CodeAnt-AI Description
Speed up SQL expression normalization without changing its output
What Changed
!=/==operator handling retain their existing behaviorImpact
✅ Faster normalization of ASCII SQL expressions✅ Unchanged Unicode expression handling✅ Preserved operator and numeric literal behavior💡 Usage Guide
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