Image Compression
Start by applying the same file size-reduction tactics used on regular, static GIF files to the images in your animation frames. For more information, see "Minimizing GIF File Sizes" in Chapter 29. These measures include:
Reducing the number of colors/bit depth.
Eliminating unnecessary dithering.
Applying the “loss” feature available in Adobe ImageReady and Macromedia Fireworks. ImageReady allows you to do weighted optimization where loss can be applied more aggressively to selected areas of the image. If your tool does not include a loss function, you can manually remove stray pixels from otherwise solid areas.
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