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⚡ Bolt: derive project lists in memory to avoid redundant API fetches#134

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bolt/optimize-project-lists-fetch-13525678629074270739
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⚡ Bolt: derive project lists in memory to avoid redundant API fetches#134
aicoder2009 wants to merge 1 commit into
mainfrom
bolt/optimize-project-lists-fetch-13525678629074270739

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@aicoder2009

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💡 What: Replaced the redundant API request to /api/projects/${projectId}/lists with a client-side in-memory filter of the global allListsResult in src/app/projects/[id]/page.tsx.

🎯 Why: The page was fetching all lists and a subset of lists concurrently. Since the backend query for the subset effectively scans all the user's lists and filters them anyway, fetching it from the API while also fetching all lists is redundant and causes unnecessary network overhead and duplicate database queries.

📊 Impact: Eliminates 1 HTTP API request per project page load. Reduces DynamoDB capacity consumption by avoiding a redundant table scan/query for the same dataset.

🔬 Measurement: Verify network requests in DevTools when loading a project detail page. You should only see fetch(/api/projects/[id]) and fetch(/api/lists) instead of the previous 3 waterfall queries. All tests still pass correctly.


PR created automatically by Jules for task 13525678629074270739 started by @aicoder2009

… requests

In `src/app/projects/[id]/page.tsx`, we were previously making concurrent `fetch` requests for `/api/projects/${projectId}/lists` and `/api/lists`. The backend for the subset actually queries all lists and filters them anyway.

This optimization removes the redundant API network request to `/api/projects/[id]/lists` and instead derives the project's lists directly by filtering the response data from the global `/api/lists` endpoint in memory.

Expected Impact: Eliminates one network request, reduces backend database queries, and improves client-side processing efficiency on project load.

Co-authored-by: aicoder2009 <127642633+aicoder2009@users.noreply.github.com>
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Copilot AI review requested due to automatic review settings May 29, 2026 08:16
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Pull request overview

This PR optimizes the project detail page by deriving project-specific lists from the already-fetched global list collection, avoiding a redundant project-lists API request.

Changes:

  • Removed the separate /api/projects/${projectId}/lists fetch from the project detail page.
  • Filters /api/lists results in memory to populate project lists.
  • Documents the optimization pattern in the Bolt learnings log.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File Description
src/app/projects/[id]/page.tsx Fetches project data and all lists only, then derives project lists client-side.
.jules/bolt.md Adds a learning entry about deriving subsets from already-fetched collections.

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Comment on lines 60 to 62
// OPTIMIZATION: Execute independent network requests and JSON parsing concurrently
// using Promise.all. This prevents a 3-step waterfall, reducing Time to First Byte
// (TTFB) and overall load time significantly on this detail page.
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