Hi,
I made quick tests with some dataset and I failed to see any performance issues. Could you create an issue with some data sample and project? Is it the index building that take a long time (there is a progress bar displayed at the bottom of the map close to the mouse coordinate information while index is currently building) or is it when you move your cursor on the map that the snaping information takes time to appear. Or is it when you pan the map? You can enable snapping for specific range of scale, avoiding building index at very large scale where snapping is useless. Regards, Julien > Hi, > > I've been using version 3.10 and 3.16 and I notice that enabling snapping is > extremely slow and oddly significantly slower on 3.16 than 3.10. We thought > it might be downloading the dataset on screen but discovered the data is back > from the database within seconds and the delay is because QGIS is building an > index. > > Why is it so inefficient and is there anything that can be done to get better > performance? > > It is really slow and we are trying to transfer users from MapInfo / ESRI so > they will not like the performance at the moment. > > To be clear the data has a primary key, spatial indices and all is of good > quality. As I say the data downloads and displays within seconds on the map; > is it because I've selected snapping to segment as well as vertex? > > Thanks, > > Paul Wittle > [cid:image001.jpg@01D6F016.C23D1CA0]<https://www.dorsetcouncil.gov.uk/> > Business Solutions Analyst (GIS) > ICT Operations > Dorset Council > 01305 228473 > <tel:01305%20228473%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20> > dorsetcouncil.gov.uk<https://www.dorsetcouncil.gov.uk> > > [cid:image002.png@01D6F016.C23D1CA0]<https://www.facebook.com/DorsetCouncilUK> > [cid:image003.png@01D6F016.C23D1CA0]<https://instagram.com/DorsetCouncilUK> > [cid:image004.png@01D6F016.C23D1CA0]<https://twitter.com/DorsetCouncilUK> > > This e-mail and any files transmitted with it are intended solely for the use > of the individual or entity to whom they are addressed. It may contain > unclassified but sensitive or protectively marked material and should be > handled accordingly. Unless you are the named addressee (or authorised to > receive it for the addressee) you may not copy or use it, or disclose it to > anyone else. If you have received this transmission in error please notify > the sender immediately. All traffic may be subject to recording and/or > monitoring in accordance with relevant legislation. Any views expressed in > this message are those of the individual sender, except where the sender > specifies and with authority, states them to be the views of Dorset Council. > Dorset Council does not accept service of documents by fax or other > electronic means. Virus checking: Whilst all reasonable steps have been taken > to ensure that this electronic communication and its attachments whether > encoded, encrypted or otherwise su pplied are free from computer viruses, Dorset Council accepts no liability in respect of any loss, cost, damage or expense suffered as a result of accessing this message or any of its attachments. For information on how Dorset Council processes your information, please see www.dorsetcouncil.gov.uk/416433 > _______________________________________________ > Qgis-user mailing list > Qgis-user@lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user _______________________________________________ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
