---
title: Worker startup time limit increased to 1 second · Changelog
description: Worker startup time limit has been increased from 400 ms to 1s
chatbotDeprioritize: true
source_url:
  html: https://developers.cloudflare.com/changelog/2025-10-10-increased-startup-time/
  md: https://developers.cloudflare.com/changelog/2025-10-10-increased-startup-time/index.md
---

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## Worker startup time limit increased to 1 second

Oct 10, 2025

[Workers](https://developers.cloudflare.com/workers/)

You can now upload a Worker that takes up 1 second to parse and execute its global scope. Previously, startup time was limited to 400 ms.

This allows you to run Workers that import more complex packages and execute more code prior to requests being handled.

For more information, see the documentation on [Workers startup limits](https://developers.cloudflare.com/workers/platform/limits/#worker-startup-time).
