Why is Matlab so long to display a plot?

Dear all, I wondered about sthg: how do Matlab display ".fig" plots when you click on it in order to open it? I mean, it is very long to display, while it is simply a x-y plot with ~400 points. Moreover, it takes a large amount of memory just for the display (I am dealing with hundreds of megabytes just to display one plot!). Is there a solution for it to be more efficient, less slow and less memory-consuming? Thank you for you answer. AC

[Jan]

Where do you click on the fig file? Which operating system are you using? Where do you determine the memory consumption? What exactly means "open it"?