[Mono-dev] GUID generation
pablosantosluac at terra.es
Fri Jul 27 16:45:46 EDT 2007
This fix looks good (performance wise)
I don't understand why it is taking so long... Specially taking into account that the old sun blade almost needs the same time... (it is about 5000 bogomips...:-P)
Any idea why the .net implementation is faster?
----- Original Message -----
From: Jonathan Chambers
Cc: mono-devel-list at lists.ximian.com
Sent: Friday, July 27, 2007 7:18 PM
Subject: Re: [Mono-dev] GUID generation
A quick test on my Xeon 3.6GHz reveals the following for me for generating a million GUIDs:
.Net: 300 ms
mono: 2300 ms
mono (modified): 1875 ms
So, not quite sure why you see 8 seconds on your server. For the modified version, I simply made the byte array inside of NewGuid static (since we are already locking for the RNG) for some performance improvement. Can someone comment if that change is acceptable?
On 7/27/07, pablosantosluac <pablosantosluac at terra.es> wrote:
I need to generate a large number of GUIDs. I tried with my laptop and a
.net console application and it can generate about 1million GUIDs in about
Then I tried the same with mono and it needed 3.4 seconds.
My surprise was trying on our Server (Intel(R) Xeon(TM) CPU 3.00GHz) where I
got the following results:
8 seconds to generate a million of GUIDs.
Surprinsingly my old Sun Blade 1000 took almost the same time (Solaris 10
SPARC): 9 seconds.
I guess there is a reason why .NET implements faster GUID generation but, is
there any other globally unique number generator for Mono/Linux which I can
use? Also, any idea why the Xeon (which is much, much faster than both the
laptop and the Solaris box) is so slooow generating GUIDs?
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