The first-time control initialization is very slow

The first-time control initialization is very slow

Posted by: dung.itcdt on 14 May 2026, 9:14 pm EST

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  dung.itcdt

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  Posted 14 May 2026, 9:14 pm EST - Updated 14 May 2026, 10:56 pm EST

  I am using the WinForms DLL version 20233.631. However, on the first run, initializing a single TextBox control takes nearly 1 second. This causes the application’s UI to freeze, creating an unpleasant experience for users. After checking the code, I found that the delay is caused by the license verification process. Is there any way to improve the performance as much as possible without upgrading the DLL version?
  
  

  

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  kartik.dua

  

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  Posted 15 May 2026, 5:44 am EST

  Hi,

  Thank you for sharing the details.

  We tested the performance behavior you described by initializing a C1TextBox object using version 4.8.20233.631. Unfortunately, we were unable to reproduce the issue you are experiencing.

  • For the first C1TextBox instance, initialization took approximately 180-220 milliseconds. This behavior is expected because, during the first initialization, the class loads its static resources and also performs a license validation check.

  • From the second instance onward, initialization took approximately 0-1 milliseconds, which is also expected since the static resources have already been initialized and the licensing check has already been completed.

  We have attached a sample project demonstrating this behavior. If you are experiencing performance issues with a different implementation, please update the sample project to reproduce the issue so that we can investigate it further.

  TextBoxPerformanceTest.zip

  Best Regards,
  
  Kartik