Hi Patrick, In that case, can this be clarified in the documentation?
Maybe a something under the section: https://www.gnu.org/software/gsl/doc/html/interp.html#c.gsl_interp_accel_alloc indicating that one MUST allocate different accelerators for data on different "x" domains, and one MAY use the same accelerator for all data that shares domain. This isn't currently, entirely clear. Thanks! Vishnu