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Form editor performance seriously degrades as the number of components on a form rises
What do you mean? You cannot resize form components. It's layout manager job. There is a scrollpane so no resizing is really performed. Please REOPEN with explicit details. I'll remove it from toppish responsiveness issues until you object.
Hm, Radim is not the author of this complaint. Probably the resizable designer area is meant, not individual components. Then it really can be slow when there are more components, because it is resized immediately when mouse is moved.
We will address this for 4.2.
Can you reevaluate the last estimate, or close this bug, please?
Closing as non-reproducible. Feel free to reopen if you are still able to reproduce it, but don't forget to provide more information then. Thank you in advance.