Performance Issues in Large STKO Model

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Farazchanna
Posts: 5
Joined: Sat Aug 30, 2025 8:19 am

Performance Issues in Large STKO Model

Post by Farazchanna » Sat Oct 25, 2025 3:09 pm

Hi everyone, I’m working on a large STKO model (file size 88 MB, 19,000+ geometry tags, and 2,400+ physical property tags, only beams and columns, no shear wall yet), and I’m experiencing serious performance slowdowns. Whenever I open the Physical Properties tab, it takes about 30~50 seconds to load, and any further interaction within that section causes the interface to become unresponsive for several minutes. Eventually, I have to close the program manually since no error log appears. I’m running STKO on an Intel i7-10750H (6 cores, 12 threads) with 16 GB RAM, GTX 1650 Ti, and Windows 10 Pro, I’d really appreciate any advice or suggestions on how to improve performance and handle large models more efficiently. Thank you in advance for your time and support.

STKO Team
Posts: 3066
Joined: Tue Oct 29, 2019 8:45 am

Re: Performance Issues in Large STKO Model

Post by STKO Team » Tue Oct 28, 2025 10:26 am

can you share your model?

Farazchanna
Posts: 5
Joined: Sat Aug 30, 2025 8:19 am

Re: Performance Issues in Large STKO Model

Post by Farazchanna » Mon Nov 24, 2025 1:57 pm

Yes, sure. Please find the files. [1] is the STKO file, [1] inside it, there are the Physical Properties. [2] is the screenshot. When I click on one property and try to assign it, STKO freezes and hangs.
Attachments
Files.zip
(6.63 MiB) Downloaded 29 times

STKO Team
Posts: 3066
Joined: Tue Oct 29, 2019 8:45 am

Re: Performance Issues in Large STKO Model

Post by STKO Team » Sat Jan 03, 2026 11:39 am

The issue comes from the automatic coloring of the WorkTree items by their usage. When you have thousands of properties (especially with fiber section) it can slow down performance.

Next version of STKO will have this fixed automatically, but in the meantime you can switch it off at the application level (i.e. you need to do it everytime you open STKO as this flag will be reset) by running this simple script:

Code: Select all

from PyMpc import *
App.setColorWorkTreeByUsageFlag(False)
tree color usage.png
tree color usage.png (188.46 KiB) Viewed 237 times

Farazchanna
Posts: 5
Joined: Sat Aug 30, 2025 8:19 am

Re: Performance Issues in Large STKO Model

Post by Farazchanna » Mon Jan 05, 2026 9:25 am

Thank you so much, It worked.

STKO Team
Posts: 3066
Joined: Tue Oct 29, 2019 8:45 am

Re: Performance Issues in Large STKO Model

Post by STKO Team » Mon Jan 05, 2026 11:10 am

You're welcome

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