How big is FTP performance load in PHP?

[Mephist0]

I have a PHP script on a domain (say example.com) and this domain has three subdomains:a.example.comb.example.comc.example.comIP addresses of this all this domains is xxx.yyy.zzz.ddd and domains differ only in last octet ("ddd" part). I think it's quite ordinary for subdomains.My question is if this fact will improve the performance of the FTP extension (the task is to create the same folder on each subdomain (every company has its own folder on each subdomain)). My idea is that FTP may use local network of hosting provider and therefory it should be pretty fast.I will try some tests but I would like to know if it is even possible or it's a "rubbish idea".Thank you for replies!