The author says that JPEG-XRs are decoded on "the software-side on the CPU" a couple of times that it seems like it might be a term of art but it sounds very aw

The author says that JPEG-XRs are decoded on "the software-side on the CPU" a couple of times that it seems like it might be a term of art but it sounds very awkward to me. Is the TLDR actually "jpeg xr implementation is poorly optimized and negatively affects browser performance which decreased conversions."