After installing Squeeze a few months ago, I’ve noticed that logging into KDE4 is unbelievably slow.
P. J. [ Editor ]
Those times sound about right, unfortunately. But a student in Summer of KDE (an overflow program for those who couldn’t get into Google Summer of Code) 2010 worked on this and got the startup time down from 30 seconds to 19 seconds. For more information, see the KDE.news article on SoK 2010 and read about Yuvraj Tomar’s project. I don’t know how he achieved that or whether his work made it into KDE SC 4.6, but you could probably find that out by looking for his commits in the KDE version control repositories for KWin and KDM.
So other than trying the newly released KDE SC 4.6 (or waiting for it make it to the “Qt/KDE semi-official package repository”), I don’t know how to speed up KDE startup.