Ofcourse I cached the Datastore and reused it for all the map operations for
both MapViewer and Geotools.
Otherwise it would not be a good comparison.
I discovered that the difference is bigger if the scale factor is larger.
For scale 1:4000 or less there is not a big difference between MapViewer and
Geotools.
For scale 1:10.000 there is a big difference, 3.5 seconds for MapViewer and 5
seconds for Geotools.
It seems Geotools has more problems rendering small features.
Ron
________________________________
From: Andrea Aime <[email protected]>
To: Ron Lindhoudt <[email protected]>
Cc: "[email protected]"
<[email protected]>
Sent: Friday, June 29, 2012 5:25 PM
Subject: Re: [Geotools-gt2-users] Rendering Oracle DB layer is very slow
compared to MapViewer
On Fri, Jun 29, 2012 at 4:02 PM, Ron Lindhoudt <[email protected]> wrote:
Andrea,
>
>
>I tried to do the comparison as clean as possible (ofcourse).
>I just timed the paint function of GTRenderer after multiple requests in a JSP
>servlet.
>The initialisation of the Datastore is outside the timing comparison!
That's not the point, the store must be cached and reused over and over, not
created each time
I initialise the Datastore only once.
>
>
>
>For a map with 1 Oracle DB layer I timed a difference of 0.5 seconds for
>MapViewer and 1.5 seconds for Geotools.
>For a map with 5 Oracle DB layers I timed a difference of 2 seconds for
>MapViewer and 3 seconds for Geotools.
>So it seems that the overhead in the Geotools paint method is 1 second bigger
>for Geotools than for MapViewer independent of the number of layers.
Can you give GeoServer a shot? If that is slower too then there is definitely
something that could be improved
(not surprisingly, since MapViewer is done by Oracle itself)
Cheers
Andrea
--
Ing. Andrea Aime
GeoSolutions S.A.S.
Tech lead
Via Poggio alle Viti 1187
55054 Massarosa (LU)
Italy
phone: +39 0584 962313
fax: +39 0584 962313
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