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Subject: Re: RLE question (slightly off-topic) - comparison with datacomp.exe

Author: martin fierz

Date: 12:51:50 03/28/02

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On March 27, 2002 at 21:45:42, Eugene Nalimov wrote:

>Under x86 Windows you can get 3Gb of address space, not 2Gb.
>
>And out of curiosity: had you tried to compress with DATACOMP.EXE?

a good question, as it turns out! - not very surprising, of course :-)

i produced my intermediate files as output and tried datacomp on them - it
compresses them better than my RLE algorithm; the file sizes which datacomp
produces range between 50% and 70% of my file sizes. i didnt compare the total
ratio, because i have about 1000 files, but just from the 10 i compressed it is
clear that datacomp is clearly better.

which makes my next question obvious: what is datacomp doing? and how fast is
the decompression of datacomp'd files? in checkers, fast access to the databases
is probably more important than in chess, because unlike chess, where these TB
positions don't crop up too often, in checkers, the db gets hit all the time -
like 10% of the nodes you search are db hits already in midgame positions, and
in endgames, every node you search is in the db.

aloha
  martin



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