> Also, compiling code that isn't in a hotspot is a waste of time, since
> you spend much longer compiling the code than you would have spent
> interpreting it, and can cause big compile pauses if the compiler does
> much optimization.

You can use a simple 1-pass compilation (without even register
allocation) that takes just a few ms for any reasonable amount of code.
 Don't forget that V8 runs (mainly) in a browser--if the browser is
sufficiently snappy, the user won't notice a compilation pause of a few
milliseconds.

Paolo