I have a small sweep excersize I came up with about 2-3 days ago. It's not too tricky but doing it fast might give you some problems.

For those who aren't too familiar with tab, the 1234 numbers on top of the tab are for fingering the pinky being 4, middle finger is 2 etc. The notes are 16th notes. You can play 'em as 16th note triplets, but I don't.
And if SAAER45 looks at this thread anymore, Dream Theater is a commercial band and John Petrucci is much better at shredding than Slash. Just listen to their song
In The Name Of God, it includes some really fast alternate picking parts and arpeggios.