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Enable swcMinify by default #41506

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merged 2 commits into from
Oct 18, 2022
Merged

Enable swcMinify by default #41506

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6b50b5f
Enable swcMinify by default
ijjk Oct 18, 2022
9a80077
Merge branch 'canary' into update/swc-minify
ijjk Oct 18, 2022
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10 changes: 5 additions & 5 deletions docs/advanced-features/compiler.md
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Expand Up @@ -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. |
Expand Down Expand Up @@ -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.
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I think "swc compiler" is redundant since swc stands for "speedy web compiler"

Also, this should be added to upgrading.md too, right?


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
Expand All @@ -271,7 +272,6 @@ module.exports = {
},
},
},
swcMinify: true,
}
```

Expand Down
2 changes: 1 addition & 1 deletion packages/next/server/config-shared.ts
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Expand Up @@ -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,
Expand Down
7 changes: 0 additions & 7 deletions packages/next/server/config.ts
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Expand Up @@ -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 ${configFileName} file accordingly.`
Expand Down
28 changes: 0 additions & 28 deletions test/.stats-app/stats-config.js
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Expand Up @@ -129,33 +129,5 @@ module.exports = {
// numRequests: 2500,
// },
},
{
title: 'Default Build with SWC minify',
// renames to apply to make file names deterministic
renames,
configFiles: [
{
path: 'next.config.js',
content: `
module.exports = {
experimental: {
appDir: true,
// remove after next stable relase (current v12.3.1)
serverComponents: true
},
swcMinify: true,
generateBuildId: () => 'BUILD_ID'
}
`,
},
],
filesToTrack: clientGlobs,
// will be output to fetched-pages/${pathname}.html
pagesToFetch: [
'http://localhost:$PORT/',
'http://localhost:$PORT/link',
'http://localhost:$PORT/withRouter',
],
},
],
}