Enable swcMinify by default (#41506)

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thread](https://vercel.slack.com/archives/CGU8HUTUH/p1666067928896099?thread_ts=1666066448.770739&cid=CGU8HUTUH)

Author: ijjk

docs/advanced-features/compiler.md

@@ -9,6 +9,7 @@ description: Learn about the Next.js Compiler, written in Rust, which transforms
 
 | Version   | Changes                                                                                                                            |
 | --------- | ---------------------------------------------------------------------------------------------------------------------------------- |
+| `v13.0.0` | SWC Minifier enabled by default.                                                                                                   |
 | `v12.3.0` | SWC Minifier [stable](https://nextjs.org/blog/next-12-3#swc-minifier-stable).                                                      |
 | `v12.2.0` | [SWC Plugins](#swc-plugins-Experimental) experimental support added.                                                               |
 | `v12.1.0` | Added support for Styled Components, Jest, Relay, Remove React Properties, Legacy Decorators, Remove Console, and jsxImportSource. |
@@ -241,18 +242,18 @@ Only `importMap` in `@emotion/babel-plugin` is not supported for now.
 
 ### Minification
 
-You can opt-in to using the Next.js compiler for minification. This is 7x faster than Terser.
+Next.js' swc compiler is used for minification by default since v13. This is 7x faster than Terser.
+
+If Terser is still needed for any reason this can be configured.
 
 ```js
 // next.config.js
 
 module.exports = {
-  swcMinify: true,
+  swcMinify: false,
 }
 ```
 
-If you have feedback about `swcMinify`, please share it on the [feedback discussion](https://github.com/vercel/next.js/discussions/30237).
-
 ## Experimental Features
 
 ### Minifier debug options
@@ -271,7 +272,6 @@ module.exports = {
       },
     },
   },
-  swcMinify: true,
 }
 ```
 

packages/next/server/config-shared.ts

@@ -547,7 +547,7 @@ export const defaultConfig: NextConfig = {
   },
   outputFileTracing: true,
   staticPageGenerationTimeout: 60,
-  swcMinify: false,
+  swcMinify: true,
   output: !!process.env.NEXT_PRIVATE_STANDALONE ? 'standalone' : undefined,
   experimental: {
     optimisticClientCache: true,

packages/next/server/config.ts

@@ -471,13 +471,6 @@ function assignDefaults(userConfig: { [key: string]: any }) {
     )
   }
 
-  if (result.experimental && 'swcMinify' in (result.experimental as any)) {
-    Log.warn(
-      `\`swcMinify\` has been moved out of \`experimental\`. Please update your ${configFileName} file accordingly.`
-    )
-    result.swcMinify = (result.experimental as any).swcMinify
-  }
-
   if (result.experimental && 'relay' in (result.experimental as any)) {
     Log.warn(
       `\`relay\` has been moved out of \`experimental\` and into \`compiler\`. Please update your ${configFileName} file accordingly.`

test/.stats-app/stats-config.js

@@ -129,33 +129,5 @@ module.exports = {
       //   numRequests: 2500,
       // },
     },
-    {
-      title: 'Default Build with SWC minify',
-      // renames to apply to make file names deterministic
-      renames,
-      configFiles: [
-        {
-          path: 'next.config.js',
-          content: `
-            module.exports = {
-              experimental: {
-                appDir: true,
-                // remove after next stable relase (current v12.3.1)
-                serverComponents: true
-              },
-              swcMinify: true,
-              generateBuildId: () => 'BUILD_ID'
-            }
-          `,
-        },
-      ],
-      filesToTrack: clientGlobs,
-      // will be output to fetched-pages/${pathname}.html
-      pagesToFetch: [
-        'http://localhost:$PORT/',
-        'http://localhost:$PORT/link',
-        'http://localhost:$PORT/withRouter',
-      ],
-    },
   ],
 }