⚡ Parallelize data fetching in generateStaticParams#32
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Refactor `generateStaticParams` to fetch talk data for all years in parallel using `Promise.all`. This reduces the build/generation time significantly compared to the sequential loop. Benchmark results (simulated 100ms network delay per request, 4 years): - Sequential: ~400ms - Parallel: ~100ms - Improvement: ~4x faster in this scenario. Added `__tests__/performance_generate_static_params.test.ts` to verify the performance improvement and prevent regression. Co-authored-by: anyulled <100741+anyulled@users.noreply.github.com>
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⌛ How to resolve this issue?After the wait time has elapsed, a review can be triggered using the We recommend that you space out your commits to avoid hitting the rate limit. 🚦 How do rate limits work?CodeRabbit enforces hourly rate limits for each developer per organization. Our paid plans have higher rate limits than the trial, open-source and free plans. In all cases, we re-allow further reviews after a brief timeout. Please see our FAQ for further information. 📝 WalkthroughWalkthroughThe PR performs whitespace cleanup across test and page files, adds Prettier ignore patterns for agent files, refactors generateStaticParams to use parallel Promise.all execution instead of sequential processing, introduces a performance test, and adjusts code indentation in multiple components. Changes
Sequence DiagramsequenceDiagram
participant Caller
participant generateStaticParams
participant Promise.all
participant getTalks as getTalks (per-year)
Caller->>generateStaticParams: generateStaticParams()
generateStaticParams->>Promise.all: map years → Promise array
par Parallel Year Processing
Promise.all->>getTalks: fetch talks for 2023
Promise.all->>getTalks: fetch talks for 2024
Promise.all->>getTalks: fetch talks for 2025
Promise.all->>getTalks: fetch talks for 2026
and
getTalks-->>Promise.all: return talks (100ms each)
getTalks-->>Promise.all: return talks (100ms each)
getTalks-->>Promise.all: return talks (100ms each)
getTalks-->>Promise.all: return talks (100ms each)
end
Promise.all->>generateStaticParams: aggregate results
generateStaticParams->>generateStaticParams: flatten & return params
generateStaticParams-->>Caller: { year, talk_id }[]
Estimated code review effort🎯 3 (Moderate) | ⏱️ ~25 minutes Poem
🚥 Pre-merge checks | ✅ 2 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (2 passed)
✏️ Tip: You can configure your own custom pre-merge checks in the settings. ✨ Finishing touches🧪 Generate unit tests (beta)
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Summary of ChangesHello @anyulled, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed! This pull request focuses on enhancing the efficiency of static parameter generation by transitioning from a sequential data retrieval mechanism to a parallel one. This fundamental shift in how data is fetched for different years aims to drastically cut down processing times, making the application more responsive during build or dynamic rendering phases. Highlights
Changelog
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Code Review
This pull request effectively parallelizes data fetching in generateStaticParams using Promise.all, which is a great performance improvement for the build process. The implementation is correct and includes proper error handling. The addition of a new performance test to verify the optimization is excellent practice. I've added a couple of suggestions to improve the accuracy and strictness of the new test file.
Refactor `generateStaticParams` to fetch talk data for all years in parallel using `Promise.all`. This reduces the build/generation time significantly compared to the sequential loop. Benchmark results (simulated 100ms network delay per request, 4 years): - Sequential: ~400ms - Parallel: ~100ms - Improvement: ~4x faster in this scenario. Added `__tests__/performance_generate_static_params.test.ts` to verify the performance improvement and prevent regression. Also fixed existing formatting issues: - Added `.agent` and `.agents` to `.prettierignore` to prevent CI failures. - Formatted `app/conditions/page.tsx`, `app/kcd/page.tsx` and other source files. Co-authored-by: anyulled <100741+anyulled@users.noreply.github.com>
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Actionable comments posted: 1
🤖 Fix all issues with AI agents
In `@__tests__/performance_generate_static_params.test.ts`:
- Around line 40-83: The test assumes a fixed list of years but doesn't mock
getAvailableEditions(), so generateStaticParams() may use the real editions and
break the assertions; update the test setup (beforeEach) to mock
getAvailableEditions (the import from "@/config/editions") to return the same
array assigned to years (["2023","2024","2025","2026"]) so
generateStaticParams() uses the controlled editions, then keep the existing mock
for getTalks and the assertions against params and timing.
🧹 Nitpick comments (2)
__tests__/performance_generate_static_params.test.ts (2)
79-82: Timing-based assertions are inherently flaky in CI.
expect(duration).toBeLessThan(300)andexpect(duration).toBeGreaterThanOrEqual(100)rely on wall-clock time, which is unreliable under CI load. A better approach would be to usejest.useFakeTimers()or simply verify thatgetTalkswas called for all years concurrently (e.g., assert all calls started before any resolved) rather than measuring elapsed time.If you want to keep a timing-based smoke test, at minimum loosen the upper bound significantly (e.g., 1000ms) to avoid flaky failures.
1-2: Unused localyears— consider deriving assertions from the mock.The
yearsconstant on Line 41 is only used forparams.lengthon Line 69. SincegetAvailableEditionsisn't mocked (see above), there's no guarantee these stay in sync. Once you mockgetAvailableEditions, deriveyearsfrom the same source or reference the mock's return value directly.
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| // Assert parallel execution (roughly 100ms) | ||
| // It should be faster than sequential (400ms) | ||
| expect(duration).toBeLessThan(300); |
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In @__tests__/performance_generate_static_params.test.ts around lines 40 - 83,
The test assumes a fixed list of years but doesn't mock getAvailableEditions(),
so generateStaticParams() may use the real editions and break the assertions;
update the test setup (beforeEach) to mock getAvailableEditions (the import from
"@/config/editions") to return the same array assigned to years
(["2023","2024","2025","2026"]) so generateStaticParams() uses the controlled
editions, then keep the existing mock for getTalks and the assertions against
params and timing.
There was a problem hiding this comment.
Thank you for the catch! I have updated the test to mock getAvailableEditions to return the fixed list of years ['2023', '2024', '2025', '2026'], ensuring the test assertions remain valid regardless of changes to the real editions configuration.
- Updated `__tests__/performance_generate_static_params.test.ts` to mock `getAvailableEditions` from `@/config/editions`. - This ensures the test remains deterministic and doesn't rely on the real configuration, preventing potential failures if the configuration changes (e.g., number of years). - Addresses PR feedback. Co-authored-by: anyulled <100741+anyulled@users.noreply.github.com>
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Closing as duplicate of #210. |
1 participant
This PR optimizes
generateStaticParamsinapp/[year]/talks/[talk_id]/page.tsxby replacing sequential data fetching with parallel fetching usingPromise.all.💡 What
forloop that iterates over years toPromise.allwithmap.__tests__/performance_generate_static_params.test.tsto verify the performance gain.🎯 Why
Fetching data sequentially for each year is inefficient and slows down the build process (or dynamic generation). Parallelizing these requests significantly reduces the total time.
📊 Measured Improvement
Using a benchmark test with a simulated 100ms delay per request for 4 years:
All existing tests passed.
package-lock.jsonchanges were reverted to ensure clean history.PR created automatically by Jules for task 11884188078307938376 started by @anyulled
Summary by CodeRabbit