Benchmarking KDE?

[hajma]

Hi,
in the kde-solaris project we've got to a point where vast majority of
KDE 4.3 builds*, so now we're turning to fixing crashes and other
lower priority stuff.
Generally KDE feels slower on OpenSolaris than on Linux so I'd like to
try some optimizations.
Is there any tool that would help me measure the impact of different
tweaks on KDE performance?
TIA

hajma

* a live DVD at http://www.genunix.org/dist/korona/Korona-0.0.2.iso