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⚡ Bolt: Eliminate Array.from overhead in CSV parsing #4313

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dieterolson wants to merge 3 commits into from
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⚡ Bolt: Eliminate Array.from overhead in CSV parsing #4313

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469bbdc
⚡ Bolt: Eliminate Array.from overhead in CSV parsing
google-labs-jules[bot] Aug 10, 2026
5fb966e
style/fix: pre-commit automated fixes
Aug 11, 2026
8ed691f
⚡ Bolt: Eliminate Array.from overhead in CSV parsing
google-labs-jules[bot] Aug 12, 2026
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11 changes: 5 additions & 6 deletions .github/workflows/cross-repo-python-integration.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -82,12 +82,11 @@ jobs:
test_command: xvfb-run --auto-servernum pytest tests/shared_contracts/ --timeout=60 --timeout-method=thread -v --tb=short
env_name: REQUIRE_REAL_TOOLS_REPO
sparse_checkout: |
chat
contracts.py
python/src/utils
shared
sidekick
src/shared/python
src/chat
src/contracts.py
src/python/src/utils
src/shared
src/sidekick
tests/shared_contracts
tests/support

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7 changes: 5 additions & 2 deletions src/p1am_control_system/frontend/src/lib/explorer/csv.ts
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Expand Up @@ -177,8 +177,11 @@ export function parseCsv(text: string): CsvTable {
const colCount = header.length;

// Materialize each source column's raw cells (padding short rows).
// ⚡ Bolt Optimization: Replace dataRows.map() per column with a single-pass loop
const rawColumns: string[][] = Array.from({ length: colCount }, () => new Array(dataRows.length));
// ⚡ Bolt Optimization: Avoid Array.from({ length }) overhead by using new Array + for-loop
const rawColumns: string[][] = new Array(colCount);
for (let c = 0; c < colCount; c += 1) {
rawColumns[c] = new Array(dataRows.length);
}
for (let r = 0; r < dataRows.length; r += 1) {
const row = dataRows[r];
for (let c = 0; c < colCount; c += 1) {
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