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# Context Edge SSR'd routes cold boot performances are proportional to the executed code size. In order to improve it, we are trying to optimize for the bundle size of a packed Edge SSR route. This PR adds ESM compilation targets for all Next.js dist packages and use them to bundle Edge SSR'd route. This allows us to leverage the better tree shaking/DCE for ESM modules in webpack in order to decrease the overall bundle size. This PR also enables minifying Edge SSR routes. Since we don't control which minifier might be used later (if any), it's best if we provide an already optimised bundle. <img width="903" alt="image" src="https://user-images.githubusercontent.com/11064311/190005211-b7cb2c58-a56a-44b0-8ee4-fd3f603e41bd.png"> This is a 10ms cold boot win per my benchmarking script, which I'll put in a subsequent PR. Not done yet: - ~~swap exported requires in `next/link` (and others) etc to point them to the esm modules version~~ <!-- Thanks for opening a PR! Your contribution is much appreciated. In order to make sure your PR is handled as smoothly as possible we request that you follow the checklist sections below. Choose the right checklist for the change that you're making: --> ## Bug - [ ] Related issues linked using `fixes #number` - [ ] Integration tests added - [ ] Errors have helpful link attached, see `contributing.md` ## Feature - [x] Implements an existing feature request or RFC. Make sure the feature request has been accepted for implementation before opening a PR. - [ ] Related issues linked using `fixes #number` - [ ] Integration tests added - [ ] Documentation added - [ ] Telemetry added. In case of a feature if it's used or not. - [ ] Errors have helpful link attached, see `contributing.md` ## Documentation / Examples - [ ] Make sure the linting passes by running `pnpm lint` - [ ] The examples guidelines are followed from [our contributing doc](https://github.com/vercel/next.js/blob/canary/contributing.md#adding-examples) Co-authored-by: JJ Kasper <jj@jjsweb.site> Co-authored-by: Shu Ding <g@shud.in> |
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Next.js
Getting Started
Visit https://nextjs.org/learn to get started with Next.js.
Documentation
Visit https://nextjs.org/docs to view the full documentation.
Who is using Next.js?
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The Next.js community can be found on GitHub Discussions, where you can ask questions, voice ideas, and share your projects.
To chat with other community members you can join the Next.js Discord.
Our Code of Conduct applies to all Next.js community channels.
Contributing
Please see our contributing.md.
Good First Issues
We have a list of good first issues that contain bugs that have a relatively limited scope. This is a great place to get started, gain experience, and get familiar with our contribution process.
Authors
- Tim Neutkens (@timneutkens)
- Naoyuki Kanezawa (@nkzawa)
- Guillermo Rauch (@rauchg)
- Arunoda Susiripala (@arunoda)
- Tony Kovanen (@tonykovanen)
- Dan Zajdband (@impronunciable)
Security
If you believe you have found a security vulnerability in Next.js, we encourage you to responsibly disclose this and not open a public issue. We will investigate all legitimate reports. Email security@vercel.com to disclose any security vulnerabilities.