Filepaths inside array and size?

[Math55]

hello, lets say i have an array with some elements like that:


/var/file1
/var/file1.2
/var/log/file2
/var/log/hallo/file3


how can i get the size of all the files in a very fast way? right now
i get it with -s, but this is very slow, if the array contains many
elements! can i do that with "du" on unix or something?

THANKS!!!