Questions and postings pertaining to the development of ImageMagick, feature enhancements, and ImageMagick internals. ImageMagick source code and algorithms are discussed here. Usage questions which are too arcane for the normal user list should also be posted here.
You can certainly build ImageMagick under Windows with gcc under Cygwin or MingW or CodeWarrior. There is a free VisualStudio compiler from Microsoft. It probably does not optimize which could make ImageMagick slow.