⚡ Bolt: Parallelize data fetching in sitemap generation

[anyulled]

💡 What: Refactored app/sitemap.ts to use Promise.all for parallelizing fetching across years and concurrently fetching speakers/talks.
🎯 Why: To reduce sitemap generation build time by eliminating sequential API waterfalls in a for...of loop.
📊 Impact: Reduces sitemap.ts generation time by ~7x (from ~4.8s to ~0.7s locally).
🔬 Measurement: Observe Next.js build times for the sitemap route or benchmark locally using bun.

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PR created automatically by Jules for task 158467066028930812 started by @anyulled

Summary by CodeRabbit

• Refactor
  • Optimized sitemap generation for improved performance through enhanced processing efficiency.

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Project	Deployment	Actions	Updated (UTC)
devbcn-nextjs	Ready	Preview, Comment	Apr 25, 2026 8:36am

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 7201de63-c9fb-4364-a4c8-52c81b2bf21d

📥 Commits

Reviewing files that changed from the base of the PR and between c98052a and b2cdf5d.

📒 Files selected for processing (1)

• app/sitemap.ts

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📝 Walkthrough

Walkthrough

The sitemap generation refactored from sequential year iteration with direct array mutation to a concurrent per-year processing model using Promise.all. Each year's speaker and talk data are fetched in parallel, then results are flattened and appended to the URLs array.

Changes

Cohort / File(s)	Summary
Sitemap Generation Concurrency app/sitemap.ts	Shifted URL generation from sequential iteration over years to parallel processing: years.map returns arrays of URLs per year, with getSpeakers and getTalks awaited concurrently via Promise.all, then flattened and merged into the final URLs array.

Estimated code review effort

🎯 4 (Complex) | ⏱️ ~50 minutes

Poem

🐰 Hopping from slow to swift we go,
Sequential paths now parallel flow,
Speakers and talks all fetch as one,
Promises race until all are done,
Faster sitemaps under the moon! 🌙

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title directly and clearly describes the main change: parallelizing data fetching in sitemap generation. This is the primary refactoring focus confirmed by both the raw summary and PR objectives.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch bolt/sitemap-parallel-fetch-158467066028930812

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[gemini-code-assist]

Code Review

This pull request refactors the sitemap generation in app/sitemap.ts to improve performance by parallelizing data fetching. The sequential loop over years has been replaced with Promise.all, and the fetching of speakers and talks for each year is now also performed concurrently. I have no feedback to provide as there were no review comments.