Diego Novillo <[EMAIL PROTECTED]> writes: >I/O is probably the biggest bottleneck, so if you have a fairly decent >I/O system, you may find higher -jN numbers giving better results.
Yes, but there is also an effect in the opposite direction: higher parallelism may compensate for slow I/O by keeping CPUs busy. My rule of thumb, no doubt suboptimal, is to build with twice as many jobs as there are cores.