8ff22ca398
Re-do of https://github.com/vercel/next.js/pull/40251 Edge SSR'd routes cold boot performances are proportional to the executed code size. In order to improve it, we are trying to optimize for the bundle size of a packed Edge SSR route. This PR adds ESM compilation targets for all Next.js dist packages and use them to bundle Edge SSR'd route. This allows us to leverage the better tree shaking/DCE for ESM modules in webpack in order to decrease the overall bundle size. This PR also enables minifying Edge SSR routes. Since we don't control which minifier might be used later (if any), it's best if we provide an already optimised bundle. <img width="903" alt="image" src="https://user-images.githubusercontent.com/11064311/190005211-b7cb2c58-a56a-44b0-8ee4-fd3f603e41bd.png"> This is a 10ms cold boot win per my benchmarking script, which I'll put in a subsequent PR. Not done yet: - ~~swap exported requires in `next/link` (and others) etc to point them to the esm modules version~~ <!-- Thanks for opening a PR! Your contribution is much appreciated. In order to make sure your PR is handled as smoothly as possible we request that you follow the checklist sections below. Choose the right checklist for the change that you're making: --> - [ ] Related issues linked using `fixes #number` - [ ] Integration tests added - [ ] Errors have helpful link attached, see `contributing.md` - [x] Implements an existing feature request or RFC. Make sure the feature request has been accepted for implementation before opening a PR. - [ ] Related issues linked using `fixes #number` - [ ] Integration tests added - [ ] Documentation added - [ ] Telemetry added. In case of a feature if it's used or not. - [ ] Errors have helpful link attached, see `contributing.md` - [ ] Make sure the linting passes by running `pnpm lint` - [ ] The examples guidelines are followed from [our contributing doc](https://github.com/vercel/next.js/blob/canary/contributing.md#adding-examples) Co-authored-by: JJ Kasper <jj@jjsweb.site> Co-authored-by: Shu Ding <g@shud.in> <!-- Thanks for opening a PR! Your contribution is much appreciated. To make sure your PR is handled as smoothly as possible we request that you follow the checklist sections below. Choose the right checklist for the change that you're making: --> ## Bug - [ ] Related issues linked using `fixes #number` - [ ] Integration tests added - [ ] Errors have a helpful link attached, see `contributing.md` ## Feature - [ ] Implements an existing feature request or RFC. Make sure the feature request has been accepted for implementation before opening a PR. - [ ] Related issues linked using `fixes #number` - [ ] Integration tests added - [ ] Documentation added - [ ] Telemetry added. In case of a feature if it's used or not. - [ ] Errors have a helpful link attached, see `contributing.md` ## Documentation / Examples - [ ] Make sure the linting passes by running `pnpm lint` - [ ] The "examples guidelines" are followed from [our contributing doc](https://github.com/vercel/next.js/blob/canary/contributing/examples/adding-examples.md) Co-authored-by: JJ Kasper <jj@jjsweb.site> Co-authored-by: Shu Ding <g@shud.in>
164 lines
4.7 KiB
TypeScript
164 lines
4.7 KiB
TypeScript
import { getModuleBuildInfo } from '../get-module-build-info'
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import { stringifyRequest } from '../../stringify-request'
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export type EdgeSSRLoaderQuery = {
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absolute500Path: string
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absoluteAppPath: string
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absoluteDocumentPath: string
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absoluteErrorPath: string
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absolutePagePath: string
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buildId: string
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dev: boolean
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isServerComponent: boolean
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page: string
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stringifiedConfig: string
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appDirLoader?: string
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pagesType?: 'app' | 'pages' | 'root'
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sriEnabled: boolean
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hasFontLoaders: boolean
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}
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/*
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For pages SSR'd at the edge, we bundle them with the ESM version of Next in order to
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benefit from the better tree-shaking and thus, smaller bundle sizes.
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The absolute paths for _app, _error and _document, used in this loader, link to the regular CJS modules.
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They are generated in `createPagesMapping` where we don't have access to `isEdgeRuntime`,
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so we have to do it here. It's not that bad because it keeps all references to ESM modules magic in this place.
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*/
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function swapDistFolderWithEsmDistFolder(path: string) {
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return path.replace('next/dist/pages', 'next/dist/esm/pages')
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}
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export default async function edgeSSRLoader(this: any) {
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const {
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dev,
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page,
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buildId,
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absolutePagePath,
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absoluteAppPath,
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absoluteDocumentPath,
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absolute500Path,
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absoluteErrorPath,
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isServerComponent,
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stringifiedConfig,
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appDirLoader: appDirLoaderBase64,
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pagesType,
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sriEnabled,
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hasFontLoaders,
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} = this.getOptions()
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const appDirLoader = Buffer.from(
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appDirLoaderBase64 || '',
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'base64'
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).toString()
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const isAppDir = pagesType === 'app'
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const buildInfo = getModuleBuildInfo(this._module)
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buildInfo.nextEdgeSSR = {
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isServerComponent: isServerComponent === 'true',
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page: page,
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isAppDir,
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}
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buildInfo.route = {
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page,
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absolutePagePath,
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}
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const stringifiedPagePath = stringifyRequest(this, absolutePagePath)
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const stringifiedAppPath = stringifyRequest(
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this,
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swapDistFolderWithEsmDistFolder(absoluteAppPath)
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)
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const stringifiedErrorPath = stringifyRequest(
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this,
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swapDistFolderWithEsmDistFolder(absoluteErrorPath)
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)
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const stringifiedDocumentPath = stringifyRequest(
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this,
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swapDistFolderWithEsmDistFolder(absoluteDocumentPath)
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)
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const stringified500Path = absolute500Path
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? stringifyRequest(this, absolute500Path)
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: null
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const pageModPath = `${appDirLoader}${stringifiedPagePath.substring(
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1,
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stringifiedPagePath.length - 1
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)}`
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const transformed = `
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import { adapter, enhanceGlobals } from 'next/dist/esm/server/web/adapter'
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import { getRender } from 'next/dist/esm/build/webpack/loaders/next-edge-ssr-loader/render'
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enhanceGlobals()
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const pageType = ${JSON.stringify(pagesType)}
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${
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isAppDir
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? `
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const Document = null
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const appRenderToHTML = require('next/dist/esm/server/app-render').renderToHTMLOrFlight
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const pagesRenderToHTML = null
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const pageMod = require(${JSON.stringify(pageModPath)})
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const appMod = null
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const errorMod = null
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const error500Mod = null
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`
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: `
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const Document = require(${stringifiedDocumentPath}).default
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const appRenderToHTML = null
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const pagesRenderToHTML = require('next/dist/esm/server/render').renderToHTML
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const pageMod = require(${stringifiedPagePath})
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const appMod = require(${stringifiedAppPath})
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const errorMod = require(${stringifiedErrorPath})
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const error500Mod = ${
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stringified500Path ? `require(${stringified500Path})` : 'null'
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}
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`
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}
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const buildManifest = self.__BUILD_MANIFEST
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const reactLoadableManifest = self.__REACT_LOADABLE_MANIFEST
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const rscManifest = self.__RSC_MANIFEST
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const rscCssManifest = self.__RSC_CSS_MANIFEST
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const subresourceIntegrityManifest = ${
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sriEnabled ? 'self.__SUBRESOURCE_INTEGRITY_MANIFEST' : 'undefined'
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}
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const fontLoaderManifest = ${
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hasFontLoaders ? 'self.__FONT_LOADER_MANIFEST' : 'undefined'
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}
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const render = getRender({
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pageType,
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dev: ${dev},
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page: ${JSON.stringify(page)},
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appMod,
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pageMod,
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errorMod,
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error500Mod,
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Document,
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buildManifest,
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appRenderToHTML,
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pagesRenderToHTML,
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reactLoadableManifest,
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serverComponentManifest: ${isServerComponent} ? rscManifest : null,
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serverCSSManifest: ${isServerComponent} ? rscCssManifest : null,
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subresourceIntegrityManifest,
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config: ${stringifiedConfig},
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buildId: ${JSON.stringify(buildId)},
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fontLoaderManifest,
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})
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export const ComponentMod = pageMod
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export default function(opts) {
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return adapter({
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...opts,
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handler: render
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})
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}`
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return transformed
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}
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