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Layer tree performance with many nodes #38890

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m-kuhn opened this issue Sep 20, 2020 · 0 comments · Fixed by #38891
Closed

Layer tree performance with many nodes #38890

m-kuhn opened this issue Sep 20, 2020 · 0 comments · Fixed by #38891
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Bug Either a bug report, or a bug fix. Let's hope for the latter!

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@m-kuhn
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m-kuhn commented Sep 20, 2020

When the layer tree has many nodes, interacting with it becomes cumbersome and slow.

Steps to reproduce:

  • Create a random point layer with 10000 points
  • Create a categorized renderer on the point id
  • Add a new layer to the legend
  • Wait (34 seconds here)
@m-kuhn m-kuhn added the Bug Either a bug report, or a bug fix. Let's hope for the latter! label Sep 20, 2020
@m-kuhn m-kuhn mentioned this issue Sep 20, 2020
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@m-kuhn m-kuhn mentioned this issue Sep 20, 2020
Merged
m-kuhn added a commit to m-kuhn/QGIS that referenced this issue Sep 20, 2020
@m-kuhn
Improve legend performance
41814ec 
Only recalculate the position of the icons for affected legend nodes.
Avoids brute forcing over complex legends as soon as something is changed.

Fixes qgis#38890
nyalldawson pushed a commit that referenced this issue Sep 20, 2020
@m-kuhn @nyalldawson
Improve legend performance
673d672 
Only recalculate the position of the icons for affected legend nodes.
Avoids brute forcing over complex legends as soon as something is changed.

Fixes #38890
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Improve legend performance m-kuhn/QGIS
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