this post was submitted on 06 Nov 2025
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The 512KB Club is a collection of performance-focused web pages from across the Internet. To qualify your website must both be actually useful and under 512KB in size. (512kb.club)
submitted 2 days ago by TheReturnOfPEB@reddthat.com to c/technology@lemmy.world
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[–] kibiz0r@midwest.social 80 points 2 days ago (2 children)

14kB club: “Amateurs!!!”

https://dev.to/shadowfaxrodeo/why-your-website-should-be-under-14kb-in-size-398n

a 14kB page can load much faster than a 15kB page — maybe 612ms faster — while the difference between a 15kB and a 16kB page is trivial.

This is because of the TCP slow start algorithm. This article will cover what that is, how it works, and why you should care.

[–] mlg@lemmy.world 14 points 2 days ago (1 children)

Something something QUIC something something

[–] hamFoilHat@lemmy.world 22 points 2 days ago (1 children)

I actually read the link and they mention QUIC

there is a notion that HTTP/3 and QUIC will do away with the 14kB rule — this is not true. QUIC recommends the same 14kB rule.

[–] mlg@lemmy.world 11 points 2 days ago

Damn I was actually gonna add more context to my original comment about how QUIC is an overrated in place UDP upgrade for HTTP, but I didn't wanna open my mouth because I haven't read the QUIC spec.

Thank you for this lol

spoilerSliding windows are for losers, spam packets at gigabit rates or go home /s

[–] sobchak@programming.dev 3 points 1 day ago (2 children)

Is it just the HTML that should be under 14kb? I think script, CSS, and image (except embedded SVGs) are separate requests? So these should individually be under 14kb to get the benefit?

[–] xthexder@l.sw0.com 5 points 1 day ago

In an ideal world, there's enough CSS/JS inlined in the HTML that the page layout is consistent and usable without secondary requests.

[–] kibiz0r@midwest.social 3 points 1 day ago (1 children)

Those additional requests will reuse the existing connection, so they’ll have more bandwidth at that point.

[–] sobchak@programming.dev 2 points 1 day ago

Interesting, didn't know that's how modern browsers worked. Guess my understanding was outdated from the HTTP/1 standard.