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<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Trebuchet MS",sans-serif">I send the question below on Friday, but due to my email address not being updated, it apparently got rejected by the list. I have now updated my email address
information and hope that this will be accepted:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Trebuchet MS",sans-serif">----------------------------------------------<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Trebuchet MS",sans-serif">We experience slow performance in QGIS 3.xx (also tried with 3.20 with no noticable improvement). Data are stored in a PostgreSQL/PostGIS database and we have done enough
testing that we do not believe that the database is the problem. </span><span lang="EN-US" style="font-size:10.0pt;font-family:"Trebuchet MS",sans-serif">And all tables are setup with spatial indexes and attribute indexes on fields used for filtering and visualization.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Trebuchet MS",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Trebuchet MS",sans-serif">The slowness shows its ugly face when for instance the program freezes for a long time when performing even simple tasks, like e.g. saving the project or moving the map
in the window.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Trebuchet MS",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Trebuchet MS",sans-serif">The issue increases with the size of the project and we don't experience any noticable slowness in small to medium sized projects. The project I tested with most recently
was about 4-5 MB when saved in QGIS 3 format (qgz) and about 40 MB when saved unzipped (qgs).<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Trebuchet MS",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Trebuchet MS",sans-serif">The project contains perhaps +/-100 vector layers from PostgreSQL/PostGIS data and a few online layers (basemap, etc.). Has anybody encountered anything similar and perhaps
even found the reason and a solution? Or is anybody aware of some <b>software that could help debug/analyze QGIS</b> to find out what takes all that ti</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Trebuchet MS",sans-serif">m</span><span style="font-size:10.0pt;font-family:"Trebuchet MS",sans-serif">e?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Trebuchet MS",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Trebuchet MS",sans-serif">As implied earlier we have tried and tested a lot including running QGIS on the same physical server as the database to eliminate network issues.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Trebuchet MS",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Trebuchet MS",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Trebuchet MS",sans-serif">Kind regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Trebuchet MS",sans-serif;color:#404040;mso-fareast-language:#2000"><br>
</span><b><span style="font-family:"Trebuchet MS",sans-serif;color:#404040;mso-fareast-language:#2000">Morten Storm<br>
</span></b><span style="font-size:10.0pt;font-family:"Trebuchet MS",sans-serif;color:#404040;mso-fareast-language:#2000">Chefkonsulent</span><span style="mso-fareast-language:#2000">
<br>
<br>
</span><a href="http://www.artogis.dk/"><span lang="DA" style="color:windowtext;text-decoration:none"><img border="0" width="211" height="32" style="width:2.1979in;height:.3333in" id="Billede_x0020_1" src="cid:image001.png@01D795BA.F26E0070"></span></a><span style="mso-fareast-language:#2000"><br>
</span><span lang="DA"><img border="0" width="208" height="52" style="width:2.1666in;height:.5416in" id="Billede_x0020_2" src="cid:image002.png@01D795BA.F26E0070"></span><o:p></o:p></p>
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