Version 3.0.6 is available upstream. Please consider updating! It seems that version 3.0.6 is available upstream, while the latest version in the Gentoo tree is 3.0.5. You think this warning is false? Read more about it here.
SISCone implements a seedless infrared (IR) safe cone jet algorithm, it takes
N^2*ln(N) time to find jets among N particles, comparing to N*2^N time of
other algorithms.