Might be.. but in anycase, the result shd come fast.
Try searching the file in the opt folder first and see how much time
it is taking .
Command: ls -l vijay

If you are able to get the folder then come back to the parent folder
and give the follwing command
find opt/ -name vijay

If it taking the same amount of time, then as you said it might be
the overhead if not there is a problem of permission.