⚡ Optimize list membership check to set for HTML tags#216
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Co-authored-by: bashandbone <89049923+bashandbone@users.noreply.github.com>
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Reviewer's guide (collapsed on small PRs)Reviewer's GuideReplaces a per-tag list membership check with a constant set literal when determining DelimiterKind for certain HTML tags, improving membership-test performance in the chunker delimiter logic. File-Level Changes
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Hey - I've left some high level feedback:
- Since this membership set is constant, consider pulling it out into a named module-level constant (e.g.,
BLOCK_LEVEL_HTML_TAGS) so it is only created once and its intent is clearer at the call site.
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Please address the comments from this code review:
## Overall Comments
- Since this membership set is constant, consider pulling it out into a named module-level constant (e.g., `BLOCK_LEVEL_HTML_TAGS`) so it is only created once and its intent is clearer at the call site.Help me be more useful! Please click 👍 or 👎 on each comment and I'll use the feedback to improve your reviews.
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Pull request overview
Micro-optimization in the HTML delimiter patterns to use a set literal for membership checks when deciding block vs paragraph delimiter kinds.
Changes:
- Replace list literal with set literal in
tag in ...membership test for HTML block tag detection.
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Co-authored-by: bashandbone <89049923+bashandbone@users.noreply.github.com>
Co-authored-by: bashandbone <89049923+bashandbone@users.noreply.github.com>
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Pull request overview
Optimizes DelimiterKind detection for specific HTML tags by switching from a list membership check to a set literal.
Changes:
- Replace
tag in [...]withtag in {...}for HTML “block” tag detection.
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Co-authored-by: bashandbone <89049923+bashandbone@users.noreply.github.com>
Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com> Signed-off-by: Adam Poulemanos <89049923+bashandbone@users.noreply.github.com>
bashandbone
deleted the
perf/optimize-html-tags-membership-check-9663154682552657493
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Pull request overview
Optimizes HTML tag DelimiterKind selection in the chunker by switching from linear list membership checks to constant-time set-like membership.
Changes:
- Introduce an
HTML_BLOCK_TAGSconstant for block-level HTML tags. - Update
HTML_TAGS_PATTERNSgeneration to useHTML_BLOCK_TAGSfor membership checks.
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| HTML_BLOCK_TAGS = frozenset({"html", "body", "main", "section", "article"}) |
💡 What: The optimization implemented
Replaced the
["html", "body", "main", "section", "article"]list with a set literal{"html", "body", "main", "section", "article"}for membership checking when determining the DelimiterKind for HTML tags.🎯 Why: The performance problem it solves$O(N)$ operations. In Python 3.12, membership checks against a constant set literal are optimized into $O(1)$ lookup time. Since this lookup is executed for every HTML tag in the list of tags, improving the lookup translates to an immediate performance improvement.
Checking if an item is in a list requires
frozensetat compile time, leading to constant📊 Measured Improvement:
Measured performance for 100,000 iterations:
[...]: ~0.63s(...): ~0.69s{...}: ~0.30sThe set lookup is approximately twice as fast as the list lookup.
PR created automatically by Jules for task 9663154682552657493 started by @bashandbone
Summary by Sourcery
Enhancements: