Unreal Engine Issues

UE-315000

Slow editor/PIE loading of UWorldPartitionHLODSourceActorsFromCell

Slow editor/PIE loading of UWorldPartitionHLODSourceActorsFromCell

Description

Loading UWorldPartitionHLODSourceActorsFromCell takes a lot of time in editor + PIE when it contains a lot of actors per UWorldPartitionHLODSourceActorsFromCell (between 2K and 2K actors).

Steps to Reproduce

From a licensee:

  • Build a WP map
  • Setup content and HLODs to end up with between 2K and 6K actors per UWorldPartitionHLODSourceActorsFromCell 
  • Load and measure the cost of loading UWorldPartitionHLODSourceActorsFromCell when loading the map.

Have Comments or More Details?

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Unresolved
ComponentUE - World Creation - Worldbuilding Tools - World Partition
Affects Versions5.6
Target Fix5.8
CreatedAug 22, 2025
UpdatedSep 10, 2025
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