⚡ Bolt: Fast manual HTML parsing to avoid regexp engine overhead - #184
⚡ Bolt: Fast manual HTML parsing to avoid regexp engine overhead#184MEKXH wants to merge 1 commit into
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Replaced the regex-based implementation in `htmlToText` with manual string parsing. `regexp.MustCompile` and `ReplaceAllString` calls have significant overhead and generate intermediate allocations. Manual parsing with `strings.Builder` and the `indexIgnoreCase` helper removes regex state machine execution and runs up to 6.3x faster for html to text conversion. Co-authored-by: MEKXH <59291264+MEKXH@users.noreply.github.com>
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💡 What: Replaced regex-based string replacements (
htmlScriptRe,htmlStyleRe,htmlTagRe) inhtmlToTextwith an optimized manual single-pass parsing loop utilizingstrings.Builderand a customindexIgnoreCasehelper.🎯 Why: The original implementation utilized 3 successive
regexp.ReplaceAllStringcalls to strip tags from HTML text. The regex engine incurs significant runtime overhead, state machine evaluation, and generates an intermediate string allocation for each pass. This caused the web fetching tool to run slowly, especially when querying large HTML documents.📊 Impact: The optimization runs approximately ~6.3x faster (22896 ns/op down to 3656 ns/op based on benchmarking) by removing intermediate string replacements and entirely avoiding the regex engine.
🔬 Measurement: A temporary benchmark test
BenchmarkHtmlToTextOptimizedininternal/tools/bench_temp_test.goconfirms the speedup. Correctness is verified via exact string comparison in unit tests.PR created automatically by Jules for task 6248319092574302039 started by @MEKXH