I have heard similar things about GIF (that there are optimisations that most encoding software does not properly take advantage of). But I haven't seen any efforts, or cutting edge software that actually follows through on that promise. The closest I've seen is gifscicle, which is a bit disappointing.

What would be great if there was some way for an animated gif's frame delays to opt-in to being interpreted correctly by browser- That is, a 0-delay really would display with no delay, and so optimisation strategies involving the splitting of image data across multiple frames could be done- and when read in by a browser, all frames would be overlaid instantly, module loading time.

What other things can be done to further optimise animated gif encoding?