Thursday, February 01, 2007

Re: Performance

From The Old Joel on Software Forum:Thanks! 5 years later.

Another post in the same thread writes:Longest common subsequence isn't quite the same problem, but it's true that compression performance should be measured in several dimensions: size (of compression), memory usage, and speed. Xdelta3 supports compression levels -1 (fast) through -9 (best).

Virtual memory does not ease the space consideration. Reading from disk is terribly slow, so Xdelta3 avoids seeking backwards in the source file during compression. Read more about xdelta3 memory settings.

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