LLVM just isn't that good for a JIT compiler: http://qinsb.blogspot.com/2011/03/unladen-swallow-retrospective.html http://qinsb.blogspot.com/2011/03/unladen-sw

LLVM just isn't that good for a JIT compiler: http://qinsb.blogspot.com/2011/03/unladen-swallow-retrospective.html http://qinsb.blogspot.com/2011/03/unladen-swallow-retrospect... Azul made it work for Java with what they said was ~20 man years of work.