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Subject: Re: Slow EGTBs

Author: Eugene Nalimov

Date: 20:53:38 01/16/03

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I believe it's Huffman decode on a top of some other compression level, but I
don't know the details. If you are really want to know ask Andrew Kadatch.

Thanks,
Eugene

On January 16, 2003 at 20:50:48, Tom Likens wrote:

>On January 16, 2003 at 16:46:10, Eugene Nalimov wrote:
>
>>David, *fast* SCSI drive is noticeable faster than best IDE drive. Problem is
>>not only 15k or 10k rpm vs. 7.2k rpm. Problem is also seek time. On best IDE
>>drive I had seen it's something ~8-9ms. On *average* SCSI drive it's ~4-5ms.
>>
>>More, I have Itanium 2 system with one SCSI drive with 320Mb/sec SCSI disk
>>drive, and one with "only" 160Mb/sec. And I regularly see the difference. Drive
>>with 320Mb/sec is really faster when I am doing something with tens of gigabytes
>>of data :-)
>>
>>Thanks,
>>Eugene
>
>Actually, this is almost exactly what I see when I profile my engine.
>The routine do_decode takes about 10ms per call, which tells me that it is
>*all* disk I/O.  By the way Eugene what does do_decode actually do?
>I'm guessing it performs the Huffman decode.
>
>regards,
>--tom



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