  We use lattice simulations and the continuous renormalization-group method,
based on the gradient flow, to study a candidate theory of composite Higgs and
a partially composite top. The model is an SU(4) gauge theory with four Dirac
fermions in each of the fundamental and two-index antisymmetric
representations. We find that the theory has an infrared fixed point at $g^2
\simeq 15.5$ in the gradient flow scheme. The mass anomalous dimension of each
representation is large at the fixed point. On the other hand, the anomalous
dimensions of top-partner operators do not exceed 0.5 at the fixed point. This
may not be large enough for a phenomenologically successful model of partial
compositeness.
