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<p>Hi Peter,</p>
<p>Did you try this on a clean new profile with no plugins
installed?</p>
<p>Bests</p>
<p>Matthias<br>
</p>
<div class="moz-cite-prefix">On 4/20/20 11:08 AM, Drexel Peter
wrote:<br>
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<p class="MsoNormal"><span lang="EN-US">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I use a Python-Script to
load all shapefiles in a directory tree one by one and
export the sld-files.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">It works fine, but slows
down incredible after ~100 files.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">So I tried the following
barebone script with just the essentials (load shapefile,
add it to the map canvas, remove it again and then clear the
project) in a loop and I get the same behavior…<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">from datetime import
datetime<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">for i in range(1, 1000):<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">
vlayer=QgsVectorLayer ("aShapeFile.shp" ,"run " + str(i) +
" at " + datetime.now().strftime('%H:%M:%S') ,"ogr")<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">
QgsProject.instance().addMapLayer(vlayer)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">
QgsProject.instance().removeMapLayer(vlayer.id())<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">
QgsProject.instance().clear()<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Same result, the Script
slows down after every iteration in the loop AND QGIS-memory
consumption goes up!<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Do I need to do some
garbage cleaning / what am I doing wrong / is this a Memory
leak?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Thanks everybody for any
hints / help!<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Peter <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<br>
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