How many cards can you have to a stack?

[Mikey]

The highest I've gone for search speed testing was 50,000, and it
seemed to work ok.


-- 
On the first day, God created the heavens and the Earth
On the second day, God created the oceans.
On the third day, God put the animals on hold for a few hours,
   and did a little diving.
And God said, "This is good."