### What?
The updates `edge-runtime` to the latest version
### Why?
https://github.com/vercel/edge-runtime/pull/428 fixes `consumeUint8ArrayReadableStream` so that when we break iteration early (due to client disconnect), we cleanup the inner stream. That will fire the stream's `cancel` handler, and allow devs to disconnect from an AI service fetch.
### How?
`edge-runtime` maintain a `try {} finally {}` over the inner stream's iteration. When we early break, JS will call `it.return()`, and that will resume `consumeUint8ArrayReadableStream` with an abrupt completion (essentially, the `yield` turns into a `return`). We'll be able to trigger the `finally {}` block with that, and we call `inner.cancel()` to cleanup.
Fixes https://github.com/vercel-labs/ai/issues/90
To resolve issue #49382, we found layer doesn't get applied for dynamic imports, so we fixed it on webpack side in https://github.com/webpack/webpack/pull/17310
This PR is to upgrade webpack to 5.86.0 with that patch as a precedence. After this we need to fix the `next/image` client components is missing in client reference manifest when using dynamic imports to fix the issue.
Hello,
We removed some core non-necessary dependencies that make Edge Runtime
smaller 🙂.
Also, Edge Runtime is exposing `WebSocket`, so nothing additional should
be done.
Closes https://github.com/vercel/next.js/issues/50760
---------
Co-authored-by: Wyatt Johnson <accounts+github@wyattjoh.ca>
## What?
While investigating slow compilation for a page on vercel.com in
development I found that there was close to 10 seconds of time
unaccounted for in `.next/trace`. Ran a profile and found that time was
spent in watchpack `batch`, specifically calling `close` many times.
When I tried to debug this further by running unbundled webpack I
noticed the same issue didn't exists.
### Before
<img width="1329" alt="Before"
src="https://github.com/vercel/next.js/assets/6324199/9ace4628-db04-4de7-993f-65aef9dffc55">
### After
<img width="1278" alt="After"
src="https://github.com/vercel/next.js/assets/6324199/55d5e58b-4a27-4235-8dea-723a7a78c117">
## Raw numbers
<table>
<tr>
<td>Before</td>
<td>After</td>
<td>Delta</td>
<td>Delta (percent)</td>
</tr>
<tr>
<td>13840 ms</td>
<td>3580 ms</td>
<td>-10260 ms</td>
<td>-74.13%</td>
</tr>
</table>
## How?
Investigated further and found that specifically not minifying watchpack
solved the issue.
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Bumping `@edge-runtime/*` <picture data-single-emoji=":edge-runtime:" title=":edge-runtime:"><img class="emoji" width="20" height="auto" src="https://emoji.slack-edge.com/T0CAQ00TU/edge-runtime/b940e917443aa49f.png" alt=":edge-runtime:" align="absmiddle"></picture> packages to their latest beta, as we had some huge improvements and big changes on how it works internally.
* Using the latest `undici` which provides a WebSocket implementation
* Less polyfill usage as we load modules in the Node.js realm, and can reuse modules from Node.js as time goes on <picture data-single-emoji=":just-right2:" title=":just-right2:"><img class="emoji" width="20" height="auto" src="https://emoji.slack-edge.com/T0CAQ00TU/just-right2/588cf34d02f4b3bd.png" alt=":just-right2:" align="absmiddle"></picture>
* `instanceof` checks now work within the realm <picture data-single-emoji=":mind_blown:" title=":mind_blown:"><img class="emoji" width="20" height="auto" src="https://emoji.slack-edge.com/T0CAQ00TU/mind_blown/0186b6f181040126.gif" alt=":mind_blown:" align="absmiddle"></picture>
