In my experience breaking layering leads to interesting optimizations. Another Cloudflare feature is using JPEG start-of-scan boundaries to guide HTTP/2 frame m

In my experience breaking layering leads to interesting optimizations. Another Cloudflare feature is using JPEG start-of-scan boundaries to guide HTTP/2 frame multiplexing: https://blog.cloudflare.com/parallel-streaming-of-progressive-images/ https://blog.cloudflare.com/parallel-streaming-of-progressiv... It's a total protocol layering violation, but makes images appear on screen much faster.