Not much improvement for Denoise AI speed but this is from the Lightroom Queens site. "This is a but slower" is why we aren't seeing an improvement. Cancelled each other out.
Classic & Desktop – DNG Compression
When converting a raw file to a lossy DNG, Lightroom now uses JPEG XL compression rather than JPEG. This is a little slower, but the quality is just as good, and the space savings are huge. This also affects files produced by the Enhance tool (Classic & Desktop), as well Merge to HDR and Panorama (Classic only… Desktop to follow), resulting in much smaller file sizes.
https://www.lightroomqueen.com/whats-new-in-lightroom-2023-10/
