I would guess, that decoding speed can become an issue for websites, where many images are already in the cache but are re-displayed rather often... I write th

I would guess, that decoding speed can become an issue for websites, where many images are already in the cache but are re-displayed rather often... I write this, because I am building such an application and for now it has many PNGs ... and yes, using a format like BPG would be fine, because I use the PNGs only because of transparency ... but when redisplay is done via a Java Script, I doubt that I could have the same speed. Loading is not so much a limiting factor, since after some time, all relevant PNGs are already in the browser cache. Can anybody say something to this topic? Of course, it would be great to have this integrated into the mayor browsers soon ...