⚡ Bolt: Prevent intermediate array allocations in ERD hot path - #1055
⚡ Bolt: Prevent intermediate array allocations in ERD hot path#1055seonghobae wants to merge 1 commit into
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Replaced `Array.from(string)` with a `for...of` loop in `sanitizeHandleId` to prevent intermediate array allocations and reduce garbage collection pressure during graph rendering and interactions.
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Noema LLM review
The change replaces Array.from with a for...of loop in sanitizeHandleId, which is behaviorally equivalent for all string inputs (including empty strings and Unicode surrogate pairs) and avoids an intermediate array allocation. The bolt.md entry documents the learning. No regressions or security issues found.
Reviewed changed lines
frontend/src/erd/handleUtils.ts:3 (RIGHT): The for...of loop iterates over Unicode code points, matching Array.from behavior. The push and join produce identical output to the original map-and-join. No behavioral change..jules/bolt.md:80 (RIGHT): The documentation entry accurately describes the preference for for...of over Array.from in hot paths, though the claim about 'significant garbage collection pressure' is somewhat subjective for typical short column names.
Adversarial validation
frontend/src/erd/handleUtils.ts:3 (RIGHT)falsified: The change introduces a behavioral regression for empty strings. — Original: Array.from('') returns [], join('-') gives '', so result is 'c-empty'. New: encodedChars = [], join('-') gives '', result is 'c-empty'. Identical.frontend/src/erd/handleUtils.ts:3 (RIGHT)falsified: The change introduces a behavioral regression for Unicode surrogate pairs. — Both Array.from and for...of iterate over code points, yielding the same code point value 1f600, padded to '1f600'. The resulting handle is identical.- Residual risk: No residual risk identified; the change is behavior-preserving for all string inputs.
Findings
- [low] .jules/bolt.md:80 (RIGHT): The learning statement claims Array.from allocates intermediate arrays, which is true, but the assertion of 'significant garbage collection pressure' may be overstated for typical short column names. This is a documentation nuance, not a code defect.
- Result: APPROVE
- Head SHA:
d066c10fd03f92327bde34f7b6da795c55303767 - Reviewer credential:
noema-review-github-app-refresh - Actor:
cwl-noema-review[bot]
seonghobae
added
area: ui-ux
ChatGPT Codex Connector
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Fresh overlap review found this PR and #1028 start from the same |
Acknowledged. Keeping this PR open and blocked pending the decision on the canonical implementation for |
1 participant
💡 What: Replaced
Array.from(string)with afor...ofloop insanitizeHandleId.🎯 Why:
sanitizeHandleIdis called constantly during ERD rendering (generating handle IDs for every column).Array.fromallocates intermediate arrays and map functions, creating significant garbage collection pressure on this hot path.📊 Impact: Eliminates unnecessary garbage collection overhead during graph rendering and interactions, leading to smoother ERD performance.
🔬 Measurement: Verify handle generation correctly processes all characters (including emojis) by running frontend tests.
PR created automatically by Jules for task 311557091477014039 started by @seonghobae