Duncan has done quick some measurements comparing zypper, yum and smart which show that zypper – the command line tool that openSUSE uses for package management – is now (finally 😉 not only comparable to yum and smart but even faster.
I would be very interested if somebody would do some extensive benchmarking to see whether zypper is faster overall and handles the corner causes as well.
Just compare: Setup for installation with yum is 19s whereas zypper needs 10s. Creation of meta data caches needs 4 minutes with yum and zypper rocks with 18s.
Memory usage: zypper needs maximal a bit over 18 MB while yum needs more than 180 MB and smart more than 60 MB.
If you run zypper – or the package management GUI applications, you really see that the team has done a great job to speed up and use less memory than before.