Skip to content

add a changelog entry about Open Next perf improvements #23277

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 10 commits into from
Aug 1, 2025
Merged

add a changelog entry about Open Next perf improvements #23277

Changes from 9 commits
Commits
Show all changes
10 commits
Select commit Hold shift + click to select a range
18e9c1c
add a changelog entry about Open Next perf improvements
vicb Jun 27, 2025
e845e89
add a changelog entry about Open Next perf improvements
vicb Jun 27, 2025
aead86b
Update src/content/changelog/workers/2025-06-05-open-next-size.mdx
vicb Jul 7, 2025
debbc71
Update src/content/changelog/workers/2025-06-05-open-next-size.mdx
vicb Jul 7, 2025
512b041
Update src/content/changelog/workers/2025-06-05-open-next-size.mdx
vicb Jul 7, 2025
4cc7a79
Update src/content/changelog/workers/2025-06-05-open-next-size.mdx
vicb Jul 7, 2025
53ac633
Update src/content/changelog/workers/2025-06-05-open-next-size.mdx
vicb Jul 7, 2025
e789ce6
Update src/content/changelog/workers/2025-06-05-open-next-size.mdx
vicb Jul 7, 2025
da0567a
fixup! upate
vicb Aug 1, 2025
20722d3
Update src/content/changelog/workers/2025-06-05-open-next-size.mdx
vicb Aug 1, 2025
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
18 changes: 18 additions & 0 deletions src/content/changelog/workers/2025-06-05-open-next-size.mdx
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,18 @@
---
title: Performance and size optimization for the Cloudflare adapter for Open Next
description: Update to the latest version of `@opennextjs/cloudflare` to automatically benefit from these improvements.
products:
- workers
date: 2025-06-05T19:00:00Z
---

With the release of the Cloudflare adapter for Open Next v1.0.0 in May 2025, we already had followups plans [to improve performance and size](https://blog.cloudflare.com/deploying-nextjs-apps-to-cloudflare-workers-with-the-opennext-adapter/#1-0-and-the-road-ahead).

`@opennextjs/cloudflare` v1.2 released on June 5, 2025 delivers on these enhancements. By removing `babel` from the app code and dropping a dependency on `@ampproject/toolbox-optimizer`, we were able to reduce generated bundle sizes. Additionally, by stopping preloading of all app routes, we were able to improve the cold start time.

This means that users will now see a decrease from 14 to 8MiB (2.3 to 1.6MiB gzipped) in generated bundle size for a Next app created via create-next-app, and typically 100ms faster startup times for their medium-sized apps.

Users only need to update to the latest version of `@opennextjs/cloudflare` to automatically benefit from these improvements.

Note that we published [CVE-2005-6087](https://github.com/opennextjs/opennextjs-cloudflare/security/advisories/GHSA-rvpw-p7vw-wj3m) for a SSRF vulnerability in the `@opennextjs/cloudflare` package.
The vulnerability has been fixed from `@opennextjs/cloudflare` v1.3.0 onwards. Please update to any version after this one. v1.6.2 is the latest at the time of writing.