Hi Niklas,
Thank you for contacting Syncfusion support.
We have checked your reported performance issue in both client and server side application and we are not able to reproduce it in our end. For your convenience, we have prepared the sample and video demonstration of this issue. Please find the link below.
Before we proceed further, we would like to let you know the following details.
1. Confirm whether you are using Blazor client side or server side application?
2. Please share your Essential studio product version and Blazor preview version?
3. If possible please replicate your issue in the above sample and sent back to us.
Could you please check the above links and get back to us with the above requested information, based on that we will check and provide you a better solution quickly.
Regards,
Sangeetha M