⚡ Bolt: Optimize CSV generation in chart snapshot - #4311
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Co-authored-by: dieterolson <198168927+dieterolson@users.noreply.github.com>
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| let csvContent = ""; | ||
| for (let i = 0; i < headers.length; i++) { | ||
| if (i > 0) csvContent += ","; | ||
| csvContent += escapeCsvValue(headers[i]); |
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When headers or a body row is sparse—which new Array<string>(n) can produce and the current .some(...) guards accept—indexing a hole passes undefined to escapeCsvValue, producing the literal text undefined. The previous map(...).join(",") implementation serialized holes as empty CSV fields, so this changes existing output and can corrupt exports containing missing cells; preserve holes as empty strings or explicitly reject sparse arrays.
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Co-authored-by: dieterolson <198168927+dieterolson@users.noreply.github.com>
Performance Benchmark ResultsNo benchmark results available. |
Co-authored-by: dieterolson <198168927+dieterolson@users.noreply.github.com>
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Consolidated into comprehensive PR #4429. |
Pull request was closed
Consolidation audit 2026-08-13 — this work is carried by #4438, not #4429#4429 ( A squash of #4429 — So #4438 was retitled CONS-B1 and landed; #4429, #4437 and #4439 were closed as superseded (#4437 and #4439 had byte-identical trees to each other). This PR's content is carried by #4438. |
…tion (#4438) Consolidates the Palette & Bolt suite that originated in #4429 (squash 91ea71b, itself covering merges of #4313, #4314, #4419, #4420) plus a movement-optimizer motion-view extraction, with Python formatting corrected to the CI-pinned ruff==0.14.10 and a Python 3.10 regression reverted. Substance: - Palette: form semantics, useId() label binding and role="alert" in RotationConverter.tsx and ODESolverCalculator.tsx. - Bolt: single-pass CSV string building in chartSnapshot.ts, Array.from removal in explorer/csv.ts, fewer intermediate allocations for SVG paths in LinePlot/ScatterPlot/SpectrumPlot.tsx. - refactor(movement-optimizer): extract MotionViewMixin into src/movement_optimizer/gui/motion_view.py. - fix(ci): correct sparse-checkout paths in cross-repo-python-integration.yml. - fix(tests): restore timezone.utc in test_action_audit.py; a pre-commit ruff pass had moved a noqa off its line, letting UP017 rewrite the import to datetime.UTC, which does not exist on Python 3.10. Supersedes, all closed as containing nothing this branch lacks: - #4429 — the original palette/bolt branch; quality-gate red at Format Check because its own pre-commit commits re-wrapped 86 files with a ruff that disagrees with the pin. Proven a strict semantic subset of this tree by normalising both sides with one ruff format pass. - #4437 and #4439 — byte-identical trees to each other (7fc2ce4), each only the #4429 squash plus a lint commit, despite advertising flight and rate-of-closure work. Palette/Bolt work items carried: #4310, #4311, #4313, #4314, #4418, #4419, #4420, #4421. None of the 59 still-open agent PRs named in the three closed PRs' descriptions are in this diff; they remain open and unconsolidated. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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💡 What: Optimized
downloadCsvby replacingheaders.map(escapeCsvValue).join(",")androw.map(escapeCsvValue).join(",")with single-passforloops.🎯 Why: Eliminates intermediate array allocations and reduces garbage collection overhead in data-intensive operations, as per Bolt's learnings.
📊 Impact: Faster CSV export with lower memory footprint.
🔬 Measurement: Ensure the generated CSV remains identical while lowering execution time overhead.
PR created automatically by Jules for task 11723817660880391859 started by @dieterolson