You might changing your repaint loop to every 500 ms or longer, 40 ms is pretty tight.
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________________________________
From: Ruben DF <rdocasalf_at_gmail.com>
Date: Fri, 13 May 2011 15:17:45 +0200
To: <openmap-users_at_bbn.com>
Subject: [OpenMap Users] Optimizing Performance
Hi all,
First of all, I'm so sorry for my two previous mails. I think I clicked accidentally and mails were sent.
Despite having written some improvements to optimize the performance (picking them up from several mails from openmap mailing list), my app continues having a low performance. I'm gonna write what I did in case anyone could help me (I'm using Openmap 4.6):
* I'm using BufferedLayerMapBean instead of using by mapBean by default.
* I'm using a set of layers (some of them are statics, others very active layers).
* The statics layers are taken from openmap.properties and the background flag as true.
* The active layers inherit from OMGraphicHandlerLayer and I'm using this code when inits
setProjectionChangePolicy(new com.bbn.openmap.layer.policy.StandardPCPolicy(this, true));
setRenderPolicy(new com.bbn.openmap.layer.policy.BufferedImageRenderPolicy());// I added this line to improve the performance
* I'm using the omGraphicList by default:
omlist = layer.prepare();
omlist.add(elements);
layer.setList(omlist);
* I have a dedicated thread to paint each 40 ms approx. and I do this:
if(omList1!=null){
omList1.generate(mapBean.getProjection());
}
......
......
if(omListN!=null){
omListN.generate(mapBean.getProjection());
}
mapBean.setBufferDirty(true);
mapBean.setDoubleBuffered(true);
Rectangle r = mapBean.getBounds();//Limits of mapBean
mapBean.repaint(r); //In order to paint just what I'm looking in a given moment (i don't know wheather this is o not correct)
* I have this commmands when execute my app:
-Djava2d.opengl=true
-Dsun.java2d.pmoffscreen=false
My computer is a Intel Xeon (2 processors at 2Ghz) and RAM 3GB. I'm aware of the rate is quite high (25hz) to refresh, but the problem is that the cpu usage is practically the same with these improvements I mentioned before (about 70% cpu) and I don't know what I can do to solve it. It's clear that if the thread sleeps for more milliseconds, the cpu usage decreases, since there are less call to repaint(). Perhaps I'm doing something wrong with my code.
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Received on Fri May 13 2011 - 09:49:12 EDT