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Re: Another comment on performance

From: Listman <listman_at_burble.net>
Date: Fri, 9 May 2008 18:25:27 -0700

On May 9, 2008, at 6:04 PM- May 9, 2008, Branko Čibej wrote:

> Harvey, Edward wrote:
>> I found that if scanning a large directory tree on the one-disk pc,
>> if you use multiple threads, it hurts performance. Test was
>> repeated with 2 threads, 5 threads, and 10 threads. Each test
>> successively worse than the previous. 1m22s , 1m34s , 1m38s. Each
>> sample was taken 3 times, and never varied more than 1s.
> That makes perfect sense. Double the number of threads and you'll
> (try to) double the rate of seeks -- and seek time is a bottleneck.

SSD disks would be a nice thing to have here ;) (the seek time is 0
as the lookup is direct)
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Received on 2008-05-10 03:26:04 CEST

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