  The equation of state of $SU(3)$ Yang-Mills theory is investigated in the
framework of a moving reference frame. Results for the entropy density, the
pressure, the energy density, and the trace anomaly are presented for
temperatures ranging from 0 to 230 $T_c$, with $T_c$ the deconfinement
temperature. The entropy density is the primary observable that has been
measured and form which the other thermodynamic quantities are obtained. At
least 4 different values of the lattice spacing have been considered at each
physical temperature in order to extrapolate to the continuum limit. The final
accuracy is 0.5%, increasing to about 1% close to the phase transition. A
detailed comparison with the results available in the literature is discussed.
