From your link.
Doesn't look very good.
features like progressive jpegs and some color spaces aren't supported. I think it could be but it isn't and not sure why
jpegs found in the wild will typically not make use of hardware acceleration or use just it for a subset of the decoding (not sure about the details). browsers didn't bother using hardware acceleration for jpegs just for the images that can be processed fine
so it is meant for jpegs you control rather than jpegs you find on the web. unless you convert them yourself
