# Conversion to World Partition very slowly

**URL:** <https://forums.unrealengine.com/t/conversion-to-world-partition-very-slowly/754234>\
**Category:** Feedback & Requests\
**Tags:** conversion, unreal-engine, WorldPartition, feedback\
**Created:** [January 21, 2023, 4:14pm UTC](https://forums.unrealengine.com/t/conversion-to-world-partition-very-slowly/754234 "2023-01-21T16:14:08Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![DragonLiSoftware](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/dragonlisoftware/32/703445_2.png) [@DragonLiSoftware](https://forums.unrealengine.com/u/DragonLiSoftware)\
**Post date:** [January 21, 2023, 4:14pm UTC](https://forums.unrealengine.com/t/conversion-to-world-partition-very-slowly/754234/1 "2023-01-21T16:14:08Z")

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Hello, I am trying to covert a large map to world partition.  
My UE is 5.1.0. The map is the demo map (/Content/ModularVictorianCity/WC\_Maps/ModularVictorianCity.umap) of “Next Gen Modular Victorian Neoclassical City (Bundle - Exterior & Interior)”, which can be downloaded from their product page. I tried some other big maps, and get similar results.  
When I use the tool in editor to convert it, the editor stay 0% for over two hours. The CPU usage is about 15% (it is Intel i7-9700k), so the editor is doing something; it uses a large amount of memory; and its disk i/o is nearly zero.

 ![Pic1](https://d3kjluh73b9h9o.cloudfront.net/original/4X/6/1/3/61394818ad8789282f38f29562f845420af39b56.png)

The UE Editor seems cannot use all computing resources when handle complicated Blueprints. I think it stuck in some single-thread tasks, and some algorithm about Blueprint has a unoptimized time complexity. I met similar phenomenon before when handling complicated Blueprints. For example, changing about one thousand static mesh components of one actor from moveable to static.

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**Author:** ![neighborlee](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/neighborlee/32/1108786_2.png) [@neighborlee](https://forums.unrealengine.com/u/neighborlee)\
**Post date:** [December 12, 2024, 11:45pm UTC](https://forums.unrealengine.com/t/conversion-to-world-partition-very-slowly/754234/2 "2024-12-12T23:45:29Z")

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Im having same issue in 55.1, is there a fix ?

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**Author:** ![XxpiingyxX](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@XxpiingyxX](https://forums.unrealengine.com/u/XxpiingyxX)\
**Post date:** [March 14, 2025, 11:34am UTC](https://forums.unrealengine.com/t/conversion-to-world-partition-very-slowly/754234/3 "2025-03-14T11:34:33Z")

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I have the same problem. Did you find a fix?

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**Author:** ![frezer748](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@frezer748](https://forums.unrealengine.com/u/frezer748)\
**Post date:** [June 13, 2025, 9:37pm UTC](https://forums.unrealengine.com/t/conversion-to-world-partition-very-slowly/754234/4 "2025-06-13T21:37:08Z")

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Same problem here in 5.6… I’ve created a basic scene with just the Default Unreal Actors in it. The conversion is stuck at 0%.