Performance problem with popup window

Hi,

We have an application with a table with 10 rows X 30 columns (like a calendar).

Each cell has a UI element of a LinkToAction (we open a popup window in this action).

We are facing a problem that when opening the popup window the rendering time is very long and the CPU consumption reaches 100%.

Did anyone face this issue or have an idea?

Thanks in advance,

Aviad