Questions tagged [performance]
Performance concerns how effectively a computing system uses resources.
781 questions
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QGIS Form // Attached tool / Big performance problem for table opening
I work with Windows with QGIS 3.34.13-Prizren.
I have a Qgis project destined to be shipped on a tablet for the field (Qfield).
The project contains a polygonal layer of 3427 objects (file shp). There ...
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Optimizing attribute table performance for large datasets in QGIS
Currently, when opening attribute tables with a large number of features, QGIS 3.44 becomes very slow and sometimes unresponsive. This happens even on high-end hardware, which suggests the bottleneck ...
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Performance of WMS publishing large VRT Dataset suffer from multiple Users accessing
I am trying to publish a rather large set of GeoTIFFs via GeoServer (roughly 22k files and ~2.5 TB data). To do this I create a VRT of all TIFF files and calculated external overviews for 20 levels. (...
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Speeding up spatial filtering in GeoPandas
I have a script that performs post-processing by filtering shapefiles buffers and area thresholds. While the logic works fine, the execution time is quite high—especially when handling thousands of ...
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Creating buffers for big MultiPolygon without out-of-memory crash in QGIS
I have a vector layer with a multipolygon with over a million single polygons (houses). I need to create a 1km and a 2km buffer around it. When I use Vector geometry - Multi-ring buffer my machine ...
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Make feature collection export more efficient/faster
I have this code where I export a FeatureCollection:
var dat = ee.FeatureCollection("projects/sat-io/open-datasets/UT-GLOBUS/dallas");
var polygons = dat
.map(function (f) {
...
- 1,284
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Concerns about Performance on big GeoTIFF export or big GeoTIFF reproject [QGIS 3.32.0-Lima + GDAL 3.7.0]
I have a little concern about the performance of certain process when are used in very big GeoTIFF Datasets. My concern is that I have a really powerful PC but appears that the performance of the PC ...
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Splitting input form in QGIS
Is there a way in QGIS to split an overly heavy input form (handling about fifty 1:n, n:1, n:m relationships) into a sequence of dialog boxes? My problem is performance.
I could split the layer into ...
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Headless script QGIS in Docker hangs forever
I have a custom processing script that basically gets a bunch of information from an API and prints a PDF layout.
The script works, and I can get outputs from it on my local Docker environment. ...
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QGIS runs rather slow on Surface Pro 10
I am working on small GIS projects for field surveys. (Just adding points and lines with an offline map.) I use a Surface Pro 10 with Windows 11 Pro, Intel core Ultra 5135U 2.10 GHz
and currently ...
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Complex iteration in QGIS geometry generator for compass rose with wind speed data
I created a little compass rose in geometry generator. It displays the spread of the wind yield in all sectors. It looks like this:
The data is stored in the attribute table in fields sek00 to sek11. ...
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Performance issues on generated vector layer overlay in QGIS form
I created a point layer. For this point layer I created a form with drag & drop option. There is a lot of automatically generated content on this form, such as elevation, coordiantes in different ...
- 235
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Opening large (10Gb) GeoJSON file in Python
As the title says, I am trying to open a large GeoJSON file in Python but it's taking a long time even to read the first 10 rows.
import geopandas as gpd
fpath = r"..\data\graph_data\buildings\...
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QGIS Server slow WMS requests on PostGIS view
We have a problem with QGIS Server WMS performance when using FILTER parameter. We analyzed SQL statements that QGIS Server sends to database and found that the problem is in statement determining ...
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Reducing load of calculating the length of network in PyQGIS
I am trying to calculate the length of a network by creating a length field and giving it an expression of $length. I have approximately 3000 features in the layer.
I tried two ways:
By giving ...
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