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// 1h agoPRODUCT UPDATE
Vercel Flags SDK Speeds Cold Starts 7x
The `@flags-sdk/vercel` adapter now loads bundled flag data immediately and avoids a network check during initialization, reducing p75 cold-start time from over 70 ms to 10 ms in internal tests. Version 1.5.3 also routes usage events through the Vercel runtime so reporting no longer extends function duration. [Vercel changelog](https://vercel.com/changelog/vercel-flags-starts-7x-faster-and-no-longer-extends-function-duration)
// ANALYSIS
This is unglamorous but important infrastructure work: feature flags become cheaper in latency and less intrusive in serverless execution.
- –Bundled datafile loading removes the first-evaluation network wait.
- –Invocation-level revision metadata checks freshness without another runtime request.
- –Vercel reports p99 flag-read latency below 1 ms across cold and warm invocations.
- –Usage reporting no longer relies on `waitUntil`, avoiding post-response function work.
- –Teams must upgrade to version 1.5.3 or later and redeploy for the improvements to take effect.
// TAGS
flags-sdksdkdevtoolcloudinfrastructureobservability
DISCOVERED
1h ago
2026-10-29
PUBLISHED
1h ago
2026-10-29
RELEVANCE
6/ 10
AUTHOR
vercel_dev