Erik Hofman wrote: > No, 64-bit is by default a bit slower. It's on very special > occasions that 64-bit outperforms 32-bit (due to data transfer > rate...)
That's true in the general case, because the larger pointer size effectively reduces the size of the L1 cache. But for this particular architecture, there are 8 extra (i.e. twice as many) general purpose registers available in 64 bit mode. Most CPU benchmarks seem to show about a 10-20% speedup when run on an AMD64 in 64 bit mode. But compilation (especially FlightGear's final link, which is, heh, awfully thrashy) is very often I/O bound, especially on a laptop with a slow disk. I guess in this case any CPU speedup is offset by the extra I/O to write the larger binary and the difference ends up as noise. :) Andy _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
