[Gvsig_english] gvSIG performances on different platforms

[Mijail]

Another detail perhaps worth considering is the maturity /  
optimization of some parts of gvSIG (or perhaps the whole Java  
platform) in each OS.

I can contribute with an example: the ECW native library, which as you  
might know we use in gvSIG, uses some optimizations (MMX / SSE  
vectorization, for example) when compiled for Windows platforms. When  
compiled for non-Windows platforms, it doesn't even try.

We don't know really how much faster is the library with those  
optimizations. At some point we would like to make some comparisons  
and, if the difference is important enough, port those optimizations  
to the other platforms.

Regards.


El 13/06/2008, a las 13:23, Benjamin Ducke escribió:

> A problematic topic, indeed.
> Generally speaking, any Linux platform any reasonably complex
> software SHOULD run faster than on Windows.
>
> - less bloated operating system (user can optionally strip system down
> to absolute bare essentials)
> - more efficient memory handling
> - more efficient filesystem(s)
> - more efficient network protocols
> - no need to run virus scanner in the background (#1 performance  
> killer
> on Win)
> - typically no need for file system defragmentation and other  
> pampering
> of system, such as root-kit detectors, anti ad-ware and those triple
> firewalls necessary to make the thing reasonably safe
>
> That being said, IF Sun's Java virtual machine SHOULD
> be less well-implemented than the Windows version, then gvSIG's speed
> WOULD suffer by comparison.  I am not aware of any such problems on  
> Linux, however. In the end, it would probably take some automated
> benchmarking on all interesting platforms to really be sure about  
> this.
>
> What I do know is that gvSIG runs with Java 1.6 on Linux, but not on
> Win, giving Linux the theoretic edge in Java performance at
> the moment. But of course, that can all change with a latter version.
>
> So don't worry too much about it: just switch to Linux and enjoy
> all the freedom and other benefits it brings with it!
>
> Cheers,
>
> Benjamin
>
>
> Chris Puttick wrote:
>> ----- "silvio grosso" <grossosilvio at yahoo.it> wrote:
>>> Hello everybody,
>>>
>>> I am wondering if gvSIG has different performances depending on the
>>> platforms where it is installed?
>>> In particular, I am interested in the differences between a  
>>> Microsoft
>>> system and a Linux one.
>>> I suppose the answer is no. I read this information in the
>>> International mailing list :-)
>>> I am confident gvSIG 2 is going to be much better than gvSIG 1.1.
>>>
>>> Nevertheless, I know a little bit OpenOffice and its Java  
>>> background.
>>> On linux (Ubuntu Hardy), OpenOffice is a bit slower than on Windows.
>>> Besides, OpenOffice has different bugs on Linux (I checked the Sun's
>>> bugs list).
>>> As a consequence, I suppose it could be the same for gvSIG (but  
>>> maybe
>>> I am wrong)?
>> OpenOffice is not a Java application, and OpenOffice Windows is not  
>> the same as OpenOffice Ubuntu - specifically OpenOffice Ubuntu has  
>> additional file filters enabled by default and some other stuff. On  
>> the otherhand, I've not heard that OpenOffice is slower on Ubuntu...
>> Java speed on Linux (which should be the key factor in gvSIG  
>> performance) should be no slower than on Windows so gvSIG should  
>> not be either.
>>> I asking this not out of curiosity but because I am planning to
>>> migrate to Linux Ubuntu (installed on a 32 bit CPU).
>>> At present, I installed VirtualBox on Windows xp home edition,  
>>> Ubuntu
>>> Hardy and, finally, gvSIG 1.1. (to avoid drivers problems).
>>> Obviously, with the Virtualitation the performances are not the best
>>> :-)
>>>
>>> My only fear is that gvSIG could be less tested on a Linuxt platform
>>> (as it happens for OpenOffice installed on a Ubuntu platform).
>> is gvSIG less tested on a Linux platform? Is OpenOffice less tested  
>> on a Linux platform? Numerically it might be on an Ubuntu platform;  
>> on the otherhand I use it (as a senior executive) all day long on  
>> Kubuntu, and the crash/lockup/annoyance rate is far better than I  
>> remember MS Office 97/2k being. As I moved fulltime to OpenOffice  
>> because I moved fulltime to Linux, I can't comment on OpenOffice  
>> issues on Linux relative to Windows ;)
>>> In conclusion, maybe, on Linux, gvSIG could be less performant?
>>>
>>> I can't tell anything about the bugs.
>>> At present, there is not a way in gvSIG to check them. Hopefully  
>>> for the gvSIG 2 series it will be different or, at least, I
>>> hope so ;-)
>>>
>>> Thanks in advance
>>>
>>> Best regards
>>>
>>> Silvio
>>>
>>>
>>>
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>
>
> -- 
> Benjamin Ducke
> Senior Applications Support and Development Officer
>
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