I guess if you use PJA toolkit your app will speed up 3 times.
----- Original Message -----
From: "David Ward" <synriga_at_yahoo.com>
To: <openmap-users_at_bbn.com>
Sent: Thursday, August 04, 2005 5:06 AM
Subject: [OpenMap Users] Poor Mapbean performance on Linux/Xwindows
(revisited)
>
> This is a topic I've seen here before, but can find the postings.
>
> On Linux/Xwindows my application suffers from poor performance. (Linux is
a
> customer requirement).
>
> The majority of the processing is being done by the Xserver with X
ometimes
> reaching 80-90% CPU.
>
> My application has 15 layers. 3 are very active layers that obtain data
from a
> server. 4 layer are associated with input and drawing. The remaining 8
layers
> provide the underlying map and geographic features. These eight layers I
> recently placed in a BufferedLayer and witness an additional performance
> increase.
>
> The active layers hold and render as many as 60,000-70,000 graphics. The
> graphics rendering doesn;t seem to be as much of an impact as bliting the
> buffer to the sever screen.
>
> I've researched the issue and discovered a JVM problem with text
antialiasing
> and alpha blending when running on Xwindows. I disabled the antialiasing
as
> much transperent rendering as I could. This resulted in a marked increase
in
> performance.
>
> However, I am still seeing poor performance.
>
> Does anyone have any tips or techniques to address the Xwindows rendering
> issue.
>
> Cheers,
> David
>
>
>
> ----
> David Ward
> ROLANDS & ASSOCIATES Corporation
> 500 Sloat Avenue
> Monterey, CA 93940
> USA
> Tel: 1.831.373.2025
> Fax: 1.831.373.2841
> Email: synriga_at_yahoo.com
>
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Received on Thu Aug 04 2005 - 04:13:06 EDT