Another example of Linux innovation is the Presto plug-in for YUM. Using a newer type of RPM called a Delta-RPM (or .drpm) which contains only the updates to previous .rpm files, Presto reduces the download sizes of updates and upgrades to RPM-based Linux OSs.
For instance, just this morning I ran “sudo yum update” from CLI. My total download was seven packages totalling thirty-six megabytes. However, using Presto and downloading only the .drpm files, I got the following response from YUM
Presto reduced the updates to 4.4 M from 32 M which is a 87% savings.
I still had 2 packages to download that totalled 3.5 MB. In total, I reduced the size of my updates downloads from 36 MB to 7.9 MB. That really is an incredible economy.