Re: NCL vs. GrADS plotting performance

Hi Jan,

Just as a quick suggestion, I think you can make the raster "ugly"
plot look much more like the
area fill "nice" plot if you set the resource "cnRasterSmoothingOn"
to True.
  -dave

On Jul 25, 2008, at 9:56 AM, Jan Ploski wrote:

> "Paulo Henrique" <paulohsm_at_gmail.com> schrieb am 07/25/2008
> 12:55:37 PM:
>
>> Hi Jan,
>>
>> I have used Ferret (http://ferret.wrc.noaa.gov/Ferret/) to produce
>> real-time weather forecast images (some examples at http://www.
>> funceme.br/rams/). Time to process images hasn't been problem to me.
>>
>> Recently I started using NCL to do the same job, and I would like to
>> know if you are interested in testing and comparing Ferret's
>> performance
> too.
>>
>> I don't know any existing performance comparison between this
>> packages, but I want to express my availability if you have some
>> idea on how to test and compare this packages.
>
> Hi Paulo,
>
> I have reconstructed the case which makes me worry about NCL's
> perfromance
> and uploaded all the relevant files here:
>
> https://bi.offis.de/ncl_perf/
>
> I guess that one possibility for an ad-hoc performance comparison
> would be
> to check how much time Ferret needs to create an equivalent of
> frame1-nice.jpg based on the same input data (see README.txt there). I
> can't really say that "this NCL plot is slow"; the very same script
> applied to another input may run in under a second whereas on this
> particular data it takes over a minute. I also haven't excluded the
> possibility that slight changes to the NCL script (such as
> modifying the
> number of steps in the color scale) could make it a lot faster.
>
> However, when the intent is to use such scripts to generate many plots
> automatically, one cannot tweak them manually here and there based
> on any
> particular input case. Of course, even if I could find out that
> Ferret is
> a lot faster on this case, I still wouldn't know whether it does not
> suffer from similar unpredictable performance on other data. That's
> why I
> am eager to hear "been there, done that" experience. Out of curiosity,
> what advantages do you see of NCL over Ferret or vice versa?
>
> Best regards,
> Jan Ploski
>
>
> --
> Dipl.-Inform. (FH) Jan Ploski
> OFFIS
> FuE Bereich Energie | R&D Division Energy
> Escherweg 2 - 26121 Oldenburg - Germany
> Phone/Fax: +49 441 9722 - 184 / 202
> E-Mail: Jan.Ploski_at_offis.de
> URL: http://www.offis.de
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Received on Fri Jul 25 2008 - 10:42:58 MDT