Mostly performance. GForth is slow compared to the optimising compilers (I know about gforth-fast already). Also I don't care that much about open source. I'm o

Mostly performance. GForth is slow compared to the optimising compilers (I know about gforth-fast already). Also I don't care that much about open source. I'm old enough not to be opposed to the idea of buying compilers. I ended up with iForth which is well priced, targets 64bit and has a simple license. Here's a feature list http://users.bart.nl/users/mhx/i4faq.html http://users.bart.nl/users/mhx/i4faq.html SwiftForth and VFX are awesome as well but 32bit only and can't justify paying that much at this point.