Holes Table for huge amounts of holes

Hello,

I am currently working with parts that contains more than 300 holes (mainly perforated rectangles). After I create the holes table in the drawing, Solidworks becomes super slow: any command I ask takes more than 3 minutes to accomplish. Do you have a solution to make it lighter? Or do you recommend a free CAD software that I could use just to get a 2D plan of these parts?

Thank you

SolidworksDrawings And Detailing