<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;">Thanks Giovanni for the response. It is entirely vector and I find that the redraws to be very slow. <br><br>I made the suggested changes on using render caching and I do not see that much performance gain.<br><br>Is there anything else to do to help the refresh speed?<br><br>Thank you for your help,<br><br>Maaza <br><br>--- On <b>Wed, 10/6/10, Giovanni Manghi <i><giovanni.manghi@gmail.com></i></b> wrote:<br><blockquote style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; padding-left: 5px;"><br>From: Giovanni Manghi <giovanni.manghi@gmail.com><br>Subject: Re: [Qgis-developer] Windows refresh rates are slow<br>To: "maaza mekuria" <sailmcm@yahoo.com><br>Cc: qgis-developer@lists.osgeo.org<br>Date: Wednesday, October 6, 2010, 3:54 AM<br><br><div class="plainMail">Hi,<br><br><br>On Tue, 2010-10-05 at 19:22 -0700, maaza mekuria
wrote:<br>> I have used QGIS from an OSGEO build and I find the refresh rates for<br>> layers to be very slow. Is there anything that I can do to overcome<br>> this problem. <br><br>rasters or vectors? size? added pyramids/overviews in rasters? did you<br>tested enabling the "use render caching where possible to speed up<br>redraws"?<br><br>cheers<br><br>-- Giovanni --<br><br><br></div></blockquote></td></tr></table><br>