⚡ Bolt: [performance improvement] Concurrent data fetching in classroom APIs

[xb1g]

💡 What: Refactored multiple sequential Supabase database queries into concurrent queries using Promise.all in two API endpoints: app/api/classrooms/route.ts and app/api/classrooms/[id]/stats/route.ts.

🎯 Why: To eliminate "waterfall" network requests. In Node.js serverless environments, waiting for independent queries sequentially artificially increases latency. By firing them concurrently, we reduce the total response time to the duration of the slowest single query.

📊 Impact: Expect a noticeable reduction in latency when fetching the user's classroom list and classroom statistics dashboard. The total database wait time in these handlers is roughly cut in half (or a third).

🔬 Measurement: Verify the improvement by timing the GET requests to /api/classrooms and /api/classrooms/[id]/stats before and after this change under typical network conditions. Ensure the test suite continues to pass and no data is missing.

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PR created automatically by Jules for task 9959380812066159046 started by @xb1g

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Pull request overview

Refactors classroom-related Next.js API route handlers to fetch independent Supabase queries concurrently, reducing request latency for the classroom list and classroom stats dashboard endpoints.

Changes:

• /api/classrooms: fetch classroom details and membership rows in parallel and compute per-classroom member/role counts from the combined results.
• /api/classrooms/[id]/stats: fetch membership roles, active assignment count, and enrollment progress concurrently to avoid sequential (“waterfall”) DB waits.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
app/api/classrooms/route.ts	Uses Promise.all to fetch classroom records and membership rows concurrently, then derives member/role counts for response shaping.
app/api/classrooms/[id]/stats/route.ts	Uses Promise.all to fetch membership role data, active assignment count, and enrollment progress concurrently before computing stats.

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Status	Name	Latest Commit	Updated (UTC)
❌ Deployment failed View logs	web	2d5ec3c	May 11 2026, 06:39 PM