Slow performance when selecting multiple lines

Hi!

On my page, 2500 lines, when I select several lines for bulk editing, for example 5 lines, the IDE is very slow and every keystroke on the keyboard takes a 1-2 second delay, and in some cases it goes up to 7 seconds.

For example, I put the cursor on 3 lines and want to delete a part of the code, I press the Delete button 5 times at once and wait 10 seconds for the IDE to delete this part of the code.

Also, at this moment, the processor load reaches 100%

How can this be solved?