Add faster handling for large numbers of files

[Isaac King]

Filezilla uses only core ftp/sftp commands, which requires it to manipulate files one at a time, incurring network overhead each time. This can result in it taking hours to delete or transfer a few thousand small files. This delay is not necessary; sshing into the remote machine and using rm -r for deletions, or zipping the files before transfer, could increase execution speed by multiple orders of magnitude.

[Tim Kosse]

This is not possible, the shell syntax is not standardized. rm -rf might just as well format your entire hard disk, erase the BIOS or launch a nuclear rocket.