Fedora 11 has Presto support, enabling Delta RPMs in yum.
This means that the difference between a patched and un-patched binary are downloaded and applied rather than the entire package. Furthermore, because this is applied to the installed binary, there is no need to have the un-patched RPM. This offers substantial decreases in download sizes during updating – typically around 70%.
More CPU cycles are used to apply Delta RPMs however.
You can enable support in Fedora 11 by opening a terminal and typing (as root):
yum install yum-presto
