Random select script

I´m using a script called Random select. I select all objects, enters a percentage and the script then randomly selects objects by that percentage. So far so good, the problem is I have so many objects so it takes like 10 minutes to get my random selection, and I need to do this operation many times. My objects are single digit editable numbers, so there are not many vectors going on.

Is there a script that is faster to do this?

I´m trying to create an image 2000x900 mm filled with the numbers 1-9, roughly 10 mm high each, spread out evenly but with random variation of the numbers. Kinda like the green flowing numbers in the Matrix movie. My client wants to put this on a conference room window. And the sizes should vary slighty. 

So I´m trying to fill the canvas with all 1´s, randomly select a part of them, use Edit>Search and replace, change the 1´s to 2´s, hide these and repeat for all numbers. But it takes for ever...