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Bail out of 404 page when favicon.ico doesn't exist #50795

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timneutkens
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What?

Anytime you open a Next.js application that doesn't have a favicon.ico you'll notice /_error is being compiled because the browser requests favicon.ico. This PR ensures the 404 page is not compiled in development for that request. It helps a little with compilation speed.

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Current dependencies on/for this PR:

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@timneutkens timneutkens merged commit 230641a into canary Jun 6, 2023
@timneutkens timneutkens deleted the 06-05-Bail_out_of_404_page_when_favicon.ico_doesn_t_exist branch June 6, 2023 08:58
sprioleau added a commit to sprioleau/sprioleau.dev that referenced this pull request Jun 7, 2023
@@ -2371,6 +2371,14 @@ export default abstract class Server<ServerOptions extends Options = Options> {
ctx: RequestContext,
err: Error | null
): Promise<ResponsePayload | null> {
// Short-circuit favicon.ico in development to avoid compiling 404 page when the app has no favicon.ico.
// Since favicon.ico is automatically requested by the browser.
if (this.renderOpts.dev && ctx.pathname === '/favicon.ico') {
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Maybe short-circuit in production is also a good idea. It wastes server to render full html 404 page that browser can't load as icon

hydRAnger pushed a commit to hydRAnger/next.js that referenced this pull request Jun 12, 2023
## What?

Anytime you open a Next.js application that doesn't have a `favicon.ico`
you'll notice `/_error` is being compiled because the browser requests
`favicon.ico`. This PR ensures the 404 page is not compiled in
development for that request. It helps a little with compilation speed.

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5 participants