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Speed up initial page render #23196

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Speed up initial page render #23196

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658eb91
Add pages pre-import
gwer Mar 18, 2021
fe5acd6
Fix deps order
gwer Mar 18, 2021
fe699a8
Try to fix serverless
gwer Mar 18, 2021
8780f62
Update packages/next/next-server/server/next-server.ts (@FDiskas)
gwer Mar 24, 2021
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17 changes: 16 additions & 1 deletion packages/next/next-server/server/next-server.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -3,7 +3,7 @@ import fs from 'fs'
import chalk from 'chalk'
import { IncomingMessage, ServerResponse } from 'http'
import Proxy from 'next/dist/compiled/http-proxy'
import { join, relative, resolve, sep } from 'path'
import { join, relative, resolve, sep, extname } from 'path'
import {
parse as parseQs,
stringify as stringifyQs,
Expand Down Expand Up @@ -242,6 +242,21 @@ export default class Server {
this.pagesManifest = require(pagesManifestPath)
}

// Pages pre-import speed up initial pages render
if (this.pagesManifest && !this._isLikeServerless) {
;[
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this.pagesManifest['/_document'],
this.pagesManifest['/_app'],
...Object.values(this.pagesManifest),
].forEach((pageModule) => {
if (extname(pageModule) !== '.js') {
return
}

require(join(this.serverBuildDir, pageModule))
})
}

this.customRoutes = this.getCustomRoutes()
this.router = new Router(this.generateRoutes())
this.setAssetPrefix(assetPrefix)
Expand Down