Caching of folder sizes

[liiight]

Something that i would love to see, is caching of folders when getting ready to transfer a queue.

I mean that the program would actually open each of the folders in the queue and retrieve the exact size of it, for more exact transfer time estimation. It should also check the files themselves using the skip list and file exist rules, for a perfect size estimation of the transfer.

Naturally some people won't need or like the delay in the trasnfer because of this option, so this should be optional.

p.s

i seareched before i posted this, so i'm sorry if someone had already suggested this.