Experimental wasm build

[padmaia]

This PR reverts #57437 because I made a false assumption that users would be able to get around not having a WASM binary by adding a Babel config file and setting swcMinify: false. I learned we are now using swc transforms at all times for things like Server Actions, so this breaks people relying on WASM builds.

While I'm adding back the wasm build, I am making it explicitly an experimental opt-in and only available for platforms where we do not have an available native binary. This way we can still make Turbopack the default experience in a minor version.

[ijjk]

Failing test suites

Commit: 5914fd7

pnpm test-start test/e2e/config-schema-check/index.test.ts

• next.config.js schema validating - defaultConfig > should validate against defaultConfig

Expand output

● next.config.js schema validating - defaultConfig › should validate against defaultConfig

expect(received).not.toContain(expected) // indexOf

Expected substring: not "Invalid next.config.js options detected"
Received string:        "yarn run v1.22.19
$ /tmp/next-install-8ff23cc6d2006c902dbbe7eae5df39b3c36677ff23b695e86685753aedc77d26/node_modules/.bin/next build
 ⚠ Invalid next.config.js options detected: 
 ⚠     Unrecognized key(s) in object: 'useWasmBinary' at \"experimental\"
 ⚠ See more info here: https://nextjs.org/docs/messages/invalid-next-config
   Linting and checking validity of types ...
   ▲ Next.js 14.0.2-canary.2

   Creating an optimized production build ...
 ✓ Compiled successfully
   Collecting page data ...
   Generating static pages (0/3) ...

 ✓ Generating static pages (3/3) 
   Finalizing page optimization ...
   Collecting build traces ...

Route (pages)                              Size     First Load JS
┌ ○ /                                      263 B          79.8 kB
└ ○ /404                                   182 B          79.7 kB
+ First Load JS shared by all              79.5 kB
  ├ chunks/framework-f4c775695db2e078.js   45.5 kB
  ├ chunks/main-3af81be19881074f.js        33.1 kB
  ├ chunks/pages/_app-5cdc0ead5ea0565e.js  206 B
  └ chunks/webpack-7d45971437c161ca.js     728 B

○  (Static)  prerendered as static HTML

Done in 13.84s.
yarn run v1.22.19
$ /tmp/next-install-8ff23cc6d2006c902dbbe7eae5df39b3c36677ff23b695e86685753aedc77d26/node_modules/.bin/next start
   ▲ Next.js 14.0.2-canary.2
   - Local:        http://localhost:38643
"

  24 |       const output = stripAnsi(next.cliOutput)
  25 |
> 26 |       expect(output).not.toContain('Invalid next.config.js options detected')
     |                          ^
  27 |     })
  28 |   }
  29 | )

  at Object.toContain (e2e/config-schema-check/index.test.ts:26:26)

Read more about building and testing Next.js in contributing.md.

[ijjk]

Stats from current PR

Default Build

General Overall increase ⚠️

	vercel/next.js canary	padmaia/next.js experimental-wasm-build	Change
buildDuration	10.8s	10.8s	N/A
buildDurationCached	6.2s	6.1s	N/A
nodeModulesSize	175 MB	175 MB	⚠️ +14.7 kB
nextStartRea..uration (ms)	396ms	399ms	N/A

Client Bundles (main, webpack)

	vercel/next.js canary	padmaia/next.js experimental-wasm-build	Change
199-HASH.js gzip	30 kB	30 kB	N/A
3f784ff6-HASH.js gzip	53.2 kB	53.2 kB	✓
494.HASH.js gzip	182 B	182 B	✓
framework-HASH.js gzip	45.5 kB	45.5 kB	✓
main-app-HASH.js gzip	254 B	251 B	N/A
main-HASH.js gzip	33.1 kB	33.1 kB	N/A
webpack-HASH.js gzip	1.75 kB	1.75 kB	N/A
Overall change	98.9 kB	98.9 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	padmaia/next.js experimental-wasm-build	Change
polyfills-HASH.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	padmaia/next.js experimental-wasm-build	Change
_app-HASH.js gzip	205 B	205 B	✓
_error-HASH.js gzip	182 B	181 B	N/A
amp-HASH.js gzip	505 B	507 B	N/A
css-HASH.js gzip	322 B	323 B	N/A
dynamic-HASH.js gzip	2.59 kB	2.59 kB	N/A
edge-ssr-HASH.js gzip	258 B	259 B	N/A
head-HASH.js gzip	348 B	347 B	N/A
hooks-HASH.js gzip	369 B	368 B	N/A
image-HASH.js gzip	4.38 kB	4.38 kB	N/A
index-HASH.js gzip	256 B	256 B	✓
link-HASH.js gzip	2.67 kB	2.67 kB	N/A
routerDirect..HASH.js gzip	318 B	318 B	✓
script-HASH.js gzip	384 B	383 B	N/A
withRouter-HASH.js gzip	319 B	320 B	N/A
1afbb74e6ecf..834.css gzip	106 B	106 B	✓
Overall change	885 B	885 B	✓

Client Build Manifests

	vercel/next.js canary	padmaia/next.js experimental-wasm-build	Change
_buildManifest.js gzip	484 B	484 B	✓
Overall change	484 B	484 B	✓

Rendered Page Sizes

	vercel/next.js canary	padmaia/next.js experimental-wasm-build	Change
index.html gzip	529 B	528 B	N/A
link.html gzip	541 B	543 B	N/A
withRouter.html gzip	525 B	524 B	N/A
Overall change	0 B	0 B	✓

Edge SSR bundle Size

	vercel/next.js canary	padmaia/next.js experimental-wasm-build	Change
edge-ssr.js gzip	96.1 kB	96.1 kB	N/A
page.js gzip	140 kB	140 kB	N/A
Overall change	0 B	0 B	✓

Middleware size

	vercel/next.js canary	padmaia/next.js experimental-wasm-build	Change
middleware-b..fest.js gzip	625 B	627 B	N/A
middleware-r..fest.js gzip	148 B	151 B	N/A
middleware.js gzip	23 kB	23 kB	✓
edge-runtime..pack.js gzip	1.92 kB	1.92 kB	✓
Overall change	25 kB	25 kB	✓

Diff details

Diff for page.js

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Diff for edge-ssr.js

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Commit: 5914fd7