  We present a new family of relativistic lattice kinetic schemes for the
efficient simulation of relativistic flows in both strongly-interacting (fluid)
and weakly-interacting (rarefied gas) regimes. The method can also deal with
both massless and massive particles, thereby encompassing ultra-relativistic
and mildly-relativistic regimes alike. The computational performance of the
method for the simulation of relativistic flows across the aforementioned
regimes is discussed in detail, along with prospects of future applications for
Quark-Gluon Plasma, electron flows in graphene and systems in astrophysical
contexts.
