https://issues.qgis.org/https://issues.qgis.org/favicon.ico2019-05-23T14:47:29ZQGIS Issue TrackingQGIS Application - Bug report #22132: Slow Vector Layer Line Rendering Speedhttps://issues.qgis.org/issues/22132?journal_id=1048602019-05-23T14:47:29ZGiovanni Manghigiovanni.manghi@gmail.com
<ul><li><strong>Affected QGIS version</strong> changed from <i>3.4.0</i> to <i>3.6.3</i></li><li><strong>Status</strong> changed from <i>Open</i> to <i>Feedback</i></li></ul><p>Can you add a link to a dataset we can use to replicate this issue?</p> QGIS Application - Bug report #22132: Slow Vector Layer Line Rendering Speedhttps://issues.qgis.org/issues/22132?journal_id=1048652019-05-23T15:06:16ZDavid MacNeildavid_macneil@hotmail.com
<ul></ul><p>Zipped Spatialite database: <a class="external" href="https://drive.google.com/open?id=1dp4SEm-qmLzrs335j4MEaRTXriPpeR3I">https://drive.google.com/open?id=1dp4SEm-qmLzrs335j4MEaRTXriPpeR3I</a> The table I'm using is called tracklines.</p> QGIS Application - Bug report #22132: Slow Vector Layer Line Rendering Speedhttps://issues.qgis.org/issues/22132?journal_id=1048662019-05-23T15:10:40ZGiovanni Manghigiovanni.manghi@gmail.com
<ul></ul><p>David MacNeil wrote:</p>
<blockquote>
<p>Zipped Spatialite database: <a class="external" href="https://drive.google.com/open?id=1dp4SEm-qmLzrs335j4MEaRTXriPpeR3I">https://drive.google.com/open?id=1dp4SEm-qmLzrs335j4MEaRTXriPpeR3I</a> The table I'm using is called tracklines.</p>
</blockquote>
<p>just tried here on Linux and no issues whatsoever regardless the size/type of symbology.</p> QGIS Application - Bug report #22132: Slow Vector Layer Line Rendering Speedhttps://issues.qgis.org/issues/22132?journal_id=1048672019-05-23T15:23:56ZDavid MacNeildavid_macneil@hotmail.com
<ul></ul><p>One thing I should add is that the slowdown is much more pronounced on a UHD monitor compared to my 1080p secondary monitor. But even on the 1080p monitor redraw is noticeably slower with a thicker line width.</p>
<p>Since you were unable to replicate on Linux it may be a Windows or Windows 10 specific issue.</p> QGIS Application - Bug report #22132: Slow Vector Layer Line Rendering Speedhttps://issues.qgis.org/issues/22132?journal_id=1048682019-05-23T17:26:47ZGiovanni Manghigiovanni.manghi@gmail.com
<ul></ul><p>David MacNeil wrote:</p>
<blockquote>
<p>One thing I should add is that the slowdown is much more pronounced on a UHD monitor compared to my 1080p secondary monitor. But even on the 1080p monitor redraw is noticeably slower with a thicker line width.</p>
<p>Since you were unable to replicate on Linux it may be a Windows or Windows 10 specific issue.</p>
</blockquote>
<p>all ok on Windows too, here.</p>