Does Discourse used optimized versions of uploads?

[hipp0]

I have S3 + cloudflare CDN setup. I am wondering if Discourse is using the full rez image or a compress optimize version shown on the forum post.

[NateDhaliwal]

Discourse compresses images to save space. See:

Faster (and smaller) uploads in Discourse with Rust, WebAssembly and MozJPEG | Blog

As of a few weeks ago, image uploads in Discourse are faster AND smaller thanks to a technique that compresses and optimizes the images clientside before they are uploaded. This blog post will describe how this feature works and how we implemented it in Discourse. This is a companion discussion topic for the original entry at https://blog.discourse.org/2021/07/faster-user-uploads-on-discourse-with-rust-webassembly-and-mozjpeg/