# Vercel changes Flags SDK to shorten startup and usage reporting

_Published Thursday, October 29, 2026 at 3:02 PM EDT · Infrastructure · Latest · Tier 2 — Notable_

![Vercel changes Flags SDK to shorten startup and usage reporting — Primary](https://assets.vercel.com/image/upload/contentful/image/e5382hct74si/4fYJWEtWkbQkxgpJFLQyP0/df11a858727d7d25e08480c89808443c/flags_7x_faster.png)

Vercel says its Flags SDK now initializes faster during cold starts and no longer keeps functions running after sending a response to report usage. Applications must update to version 1.5.3 or later and redeploy.

The SDK loads bundled flag data when the client is created and checks its revision without a network request. Internal testing reduced p75 cold-start initialization from over 70 ms to 10 ms. Usage events now pass to the Vercel runtime instead of using waitUntil, eliminating the additional function duration previously required for reporting.

## Sources

- [Vercel News](https://vercel.com/changelog/vercel-flags-starts-7x-faster-and-no-longer-extends-function-duration)

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Canonical: https://techandbusiness.org/newswire/c9W8n7GVzSXexzQF87QMlA
Published: 2026-10-29T19:02:38.736Z
Story chronology: 2026-10-29T06:00:00.000Z
Retrieved: 2026-10-29T22:43:46.625Z
Publisher: Tech & Business (techandbusiness.org)