Matt Campbell wrote:
Another factor worth considering is the size of the LZMA dictionary, which is determined when initializing the compressor. The dilemma here is that a larger dictionary leads to a better compression ratio, especially when the data contains much repetition (e.g. many similar screen redraws), but it also requires more memory on the decompression end (the viewer in this case). The default dictionary size is 8 MB; this would require 8 MB of RAM on the viewer end. This is fine for most desktop systems, but probably not for cell phones, PDA's, etc. -- yet users of these devices could probably stand to benefit the most from improved framebuffer compression. Any thoughts on how best to handle this trade-off?
Is there any place in the negotiation process where the viewer could check how much RAM is available on the client machine, then pass this along to the server and then a dictionary size is decided upon?
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