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Subject: Re: Hashtable and stuffing the PV in it, with links

Author: Uri Blass

Date: 06:36:04 06/17/03

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On June 17, 2003 at 08:56:06, Kim Roper Jensen wrote:

>On June 17, 2003 at 08:46:21, Uri Blass wrote:
>
>>On June 17, 2003 at 08:25:32, Kim Roper Jensen wrote:
>>
>>>Hi
>>>
>>>After reading the posts regarding hashtables, where Robert Hyatt and others show
>>>that the most significant improvements is in the 24M-96M area I was thinking
>>>about the whole hashtable thingie...
>>
>>I do not understand what is special in the 24M-96M that make it more important
>>than the 6M-24M area and other areas that you multiply the hash size by 4.
>>
>
>See this http://fortuna.iasi.rdsnet.ro/ccc/ccc.php?art_id=291166
>
>taking a little out of context: "the speed break-even point seems to be around
>96M for fine-tuning, or around
>24M if you look only for large speedups.

I think that there were not enough positions in that link.
The results of being almost 3 times faster from doubling the hash size from 6
mbytes to 12 mbytes seems illogical to me.

I also cannot learn that 96 mbytes are optimal and it may be dependent on the
time control.

Uri



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