Very early, rough and variable timings
Results sometimes vary across operating system, machine, etc.
Very Encouraging however
Cumsum
164 times faster than interpreted code
33 times faster than byte-code compiler
2D Random Walk
263 & 475 times faster than interpreted code on Linux & OSX
173 & 317 times faster than byte-compiler on Linux & OSX
Byte compiler gives a factor of between 1.5 and 4