Thanks to everybody for the quick replies.
However, to gearpins, I find it quite hard to go and search for the Landing Performance or Landing Ground Roll charts on the manual if I have a serious failure situation going on. To tell you all the truth, when I am on a sim session and a flight divertion needs to be executed, (if I am not flying on a area I know) I just look for the approach chart and look for the category of my aircraft, if I found it, good enough, if I don't, then search another airport (which I should have a some 3 or 4 in my mind already before taking off since I did a planned my flight).
Adding a little spin, yet still talking about performance, only this time it would be takeoff performance, I found something else. Goes like this:
"If SWY is larger than the CWY, V1 is increased. If CWY is larger than the SWY, V1 is decreased".
I assume that is because you have the additional "runway" surface to stop, in the event of a RTO. However, I don't understand what's the point of stating the CWY in that sentence, or what role does it play. (Oh, boy...I'm too ignorant!
)