  We consider the (1+1)-dimensional ${\cal N}=(2,2)$ super Yang--Mills theory
which is obtained by dimensionally reducing ${\cal N}=1$ super Yang--Mills
theory in four dimension to two dimensions. We do our calculations in the
large-$N_c$ approximation using Supersymmetric Discrete Light Cone
Quantization. The objective is to calculate quantities that might be
investigated by researchers using other numerical methods. We present a
precision study of the low-mass spectrum and the stress-energy correlator
$<T^{++}(r) T^{++}(0)>$. We find that the mass gap of this theory closes as the
numerical resolution goes to infinity and that the correlator in the
intermediate $r$ region behaves like $r^{-4.75}$.
