Actix-web in used in production at Cloudflare for the image resizing feature.
It's been relatively easy to use and flexible enough to integrate with the rest of Cloudflare's stack. Feels vaguely similar to Node's express. Along with Rust it's a great fit for a service that needs to have high performance, tight memory usage with very low risk of leaks, integration with existing libraries, and a good security story.
Oh, that's really interesting. I actually used it for exactly the same purpose, but I was a bit disappointed by the image[1] crate for the image-resizing itself: it was several times slower than imagemagick (it was less the case on my decktop, when compiled with `target-cpu=native`, but on my low-end server many SIMD instructions weren't available and auto-vectorized code wasn't that efficient) and the image quality was also way poorer. Did you use that crate for the image processing ? Or imagemagick ? Or something you wrote internally ?