From caa908326f19da7d2c292e61cb9fc29cdc21248d Mon Sep 17 00:00:00 2001
From: romeobravo <rubenbuitelaar@gmail.com>
Date: Tue, 19 Sep 2023 03:41:18 +0200
Subject: [PATCH 1/2] chore: Fix heading hierarchy in revalidateTag
 documentation (#55470)

### What?
Fix heading hierarchy in revalidateTag documentation (https://nextjs.org/docs/app/api-reference/functions/revalidateTag)

### Why?
Makes it consistent with https://nextjs.org/docs/app/api-reference/functions/revalidatePath
---
 docs/02-app/02-api-reference/04-functions/revalidateTag.mdx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/02-app/02-api-reference/04-functions/revalidateTag.mdx b/docs/02-app/02-api-reference/04-functions/revalidateTag.mdx
index dd8680f59df3e..364c8bc47eb8b 100644
--- a/docs/02-app/02-api-reference/04-functions/revalidateTag.mdx
+++ b/docs/02-app/02-api-reference/04-functions/revalidateTag.mdx
@@ -30,7 +30,7 @@ fetch(url, { next: { tags: [...] } });
 
 ## Examples
 
-## Server Action
+### Server Action
 
 ```ts filename="app/actions.ts" switcher
 'use server'

From f630cb8e56dab3f7a7798e80076cf9a752e6f31b Mon Sep 17 00:00:00 2001
From: Shu Ding <g@shud.in>
Date: Tue, 19 Sep 2023 12:31:38 +0200
Subject: [PATCH 2/2] Add `mui-core` to the default `optimizePackageImports`
 list (#55554)

Feedback from https://github.com/vercel/next.js/issues/48748#issuecomment-1714292279.

As per my testing, an App Router route of

```tsx
'use client'

import { Button } from 'mui-core'

export default function Page() {
  return <Button>Hi</Button>
}
```

was improved from `2.4s (1221 modules)` to `1458ms (649 modules)` for the local dev.
---
 packages/next/src/server/config.ts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/packages/next/src/server/config.ts b/packages/next/src/server/config.ts
index f1337de506214..a3462031ce225 100644
--- a/packages/next/src/server/config.ts
+++ b/packages/next/src/server/config.ts
@@ -724,6 +724,7 @@ function assignDefaults(
       'react-use',
       '@material-ui/icons',
       '@tabler/icons-react',
+      'mui-core',
     ]),
   ]