Code-walking macros are very powerful, but there's a performance caveat: https://code.google.com/p/chibi-scheme/issues/detail?id=114#c3 https://code.google.com

Code-walking macros are very powerful, but there's a performance caveat: https://code.google.com/p/chibi-scheme/issues/detail?id=114#c3 https://code.google.com/p/chibi-scheme/issues/detail?id=114#... For most macros, this won't be an issue. But if you wind up with code-walking macros than can be nested, you need to be mindful of the nesting or your code might take a while to compile.