⚡ Bolt: Optimize CSV rendering by replacing chained array methods with single-pass loops#352
⚡ Bolt: Optimize CSV rendering by replacing chained array methods with single-pass loops#352schmug wants to merge 1 commit into
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Replaced `.map().join()` and `.filter().map().join()` chains with single-pass `for...of` loops in `src/csv.ts`. This avoids unnecessary array allocations and reduces Garbage Collection pressure on the hot rendering path when generating datasets. Co-authored-by: schmug <38227427+schmug@users.noreply.github.com>
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| Status | Name | Latest Commit | Updated (UTC) |
|---|---|---|---|
| ✅ Deployment successful! View logs |
dmarcheck | cf3d32b | May 22 2026, 01:39 AM |
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💡 What:
Replaced
.map().join()and.filter().map().join()method chains with single-passfor...ofloops informatFindingsandgenerateCsvwithinsrc/csv.ts.🎯 Why:
The original array method chains created intermediate arrays and closure functions that were immediately discarded. In heavy rendering functions or large data processing tasks (like bulk CSV exports), this causes excessive memory allocation and Garbage Collection (GC) pressure. This slows down the Cloudflare Worker execution time and can cause memory spikes. A single pass using simple string concatenation efficiently avoids these allocations altogether.
📊 Impact:
🔬 Measurement:
vitest runresults on string generation logic intest/csv.test.tspass efficiently.biome checkand lint validations maintain formatting standards correctly.PR created automatically by Jules for task 14995409773544362616 started by @schmug