NAME GIS::Distance::Fast - C implementation of GIS::Distance formulas. DESCRIPTION This distribution re-implements some, but not all, of the formulas that come with GIS::Distance in the C programming language. C code is generally much faster than the perl equivilent. In most of my testing I've found that the C version of the formulas outperform the Perl equivelent by at least 2x. This module need not be used directly. GIS::Distance will automatically use the ::Fast formulas when they are available. FORMULAS GIS::Distance::Formula::Cosine::Fast GIS::Distance::Formula::Haversine::Fast GIS::Distance::Formula::Vincenty::Fast BUGS The GIS::Distance::Formula::Vincenty::Fast produces slightly different results than GIS::Distance::Formula::Vincenty. Read the POD for GIS::Distance::Formula::Vincenty::Fast for details. AUTHOR Aran Clary Deltac LICENSE This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.