  TwoPunctures is perhaps the most widely-adopted code for generating binary
black hole "puncture" initial data and interpolating these (spectral) data onto
evolution grids. In typical usage, the bulk of this code's run time is spent in
its spectral interpolation routine. We announce a new publicly-available
spectral interpolation routine that improves the performance of the original
interpolation routine by a factor of ~100, yielding results consistent with the
original spectral interpolation routine to roundoff precision. This note serves
as a guide for installing this routine both in the original standalone
TwoPunctures code and the Einstein Toolkit supported version of this code.
