i was expecting benchmarks of actual code, not just known performance killers
it'd probably be more representative of overall performance that way
if you select and use an engine here based on how fast it can leak arguments objects or some other weird case, you won't know if it's actually faster at running real code
and anyway i don't think choosing an engine is that important when they're all fairly decent, and if you want speed you should be optimizing your program's logic instead of only relying of how well the engine runs it