Sep 21, 2017 term paper 2

LAZY EVALUATION CAN DO WORSE THAN GREEDY PARSING. CONSIDER AN LZSS-TYPE SCHEME WHERE OFFSETS ARE…

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Lazy evaluation can do worse than greedy parsing. Consider an LZSS-type scheme where offsets are represented in 12 bits and lengths are represented in 4 bits with match lengths from 2–17. The use of a control bit means that an (offset,length)-pair requires 17 bits and a literal requires 9 bits. Suppose the current window contains

Show that greedy parsing leads to 34 bits output, while lazy evaluation results in 43 bits.


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