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Subject: Re: To anyone who has ever automatically created an opening book

Author: Vincent Diepeveen

Date: 11:38:51 11/10/01

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On November 09, 2001 at 11:54:42, John Merlino wrote:

>Since I am modifying the opening book format in Chessmaster to allow an
>"unlimited" number of moves in a book, I was wondering a few things about the
>general performance of my PGN importer.
>
>Some questions:
>
>1) In general, how long does it take to create a book (i.e. size to time ratio).

In diep-engine it takes depending upon number of games (1 million)
around a full night.

>2) How much memory does the process take (size to RAM ratio).

i can set that size, but up to 500MB it might swallow in. the
RAM ain't the problem. the slow allocation and deallocation of
memory is.

>In my largest test, I used a PGN file with almost 150,000 games in it, and I'm
>wondering if my time/RAM usage is anything close to "the norm". I'd rather not
>give out the stats of this process just yet, to avoid any bias in responses. ;->
>Many thanks,
>
>jm



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