This question I answered many moons ago may be useful: http://stackoverflow.com/questions/1296683/curiosity-why-does-expression-when-compiled-run-faster-than-a

This question I answered many moons ago may be useful: http://stackoverflow.com/questions/1296683/curiosity-why-does-expression-when-compiled-run-faster-than-a-minimal-dyna http://stackoverflow.com/questions/1296683/curiosity-why-doe... Combined with this approach to debugging using `.load sos`: http://blog.barrkel.com/2006/07/not-so-lazy-garbage-collector.html http://blog.barrkel.com/2006/07/not-so-lazy-garbage-collecto... The SOS debugging extension makes following JITted code much easier. Of course if you're looking at async code, or the body of an iterator method, or a lambda body that's capturing variables, you need to understand those high-level transformations first.