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perf: Implement Next.js Edge Timeout Racer with Stale Cache fallback #5288

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Merged
JhaSourav07 merged 2 commits into from
Jun 12, 2026
Merged

perf: Implement Next.js Edge Timeout Racer with Stale Cache fallback #5288

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4a7bfc6
perf: Implement Next.js Edge Timeout Racer with Stale Cache fallback
MasterJi27 Jun 11, 2026
87ea8d6
Merge branch 'main' into perf-edge-timeout-racer-5240
MasterJi27 Jun 11, 2026
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43 changes: 38 additions & 5 deletions lib/github.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -523,6 +523,8 @@ export function displayName(profile: GitHubUserProfile): string {
* DATA FETCHING
* ========================================================================== */

const FETCH_TIMEOUT_MS = 4000;

export async function fetchGitHubContributions(
username: string,
options: FetchOptions = {}
Expand All @@ -537,16 +539,47 @@ export async function fetchGitHubContributions(
: true;
};

const load = () => fetchContributionsUncached(username, key, options);
const loadWithTimeout = async (): Promise<ExtendedContributionData> => {
const controller = new AbortController();
if (options.signal) {
if (options.signal.aborted) {
controller.abort();
} else {
options.signal.addEventListener('abort', () => controller.abort(), { once: true });
}
}

let timerId = null;
const timeoutPromise = new Promise<never>((_, reject) => {
timerId = setTimeout(() => {
controller.abort();
reject(new Error(`GitHub API request timed out after ${FETCH_TIMEOUT_MS / 1000}s`));
}, FETCH_TIMEOUT_MS);
if (timerId && typeof timerId.unref === 'function') {
timerId.unref();
}
});

try {
return await Promise.race([
fetchContributionsUncached(username, key, { ...options, signal: controller.signal }),
timeoutPromise,
]);
} finally {
if (timerId) {
clearTimeout(timerId);
}
}
};

if (options.bypassCache || options.forceRefresh) {
try {
return await load();
return await loadWithTimeout();
} catch (err: unknown) {
const staleData = await contributionsCache.get(key);
if (staleData) {
console.warn(
`[GitHub API] Fetch failed for "${username}", falling back to stale cache:`,
`[GitHub API] Fetch failed or timed out for "${username}", falling back to stale cache:`,
err
);
return {
Expand All @@ -559,12 +592,12 @@ export async function fetchGitHubContributions(
}

try {
return await contributionsCache.getOrSet(key, load, LONG_CACHE_TTL, shouldFetch);
return await contributionsCache.getOrSet(key, loadWithTimeout, LONG_CACHE_TTL, shouldFetch);
} catch (err: unknown) {
const staleData = await contributionsCache.get(key);
if (staleData) {
console.warn(
`[GitHub API] Fetch failed for "${username}", falling work back to stale cache:`,
`[GitHub API] Fetch failed or timed out for "${username}", falling back to stale cache:`,
err
);
return {
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