One of the other Haiku developers had this [1] response to an inquiry about why Haiku is so fast: > The system is not all that well optimized, uses a 15 year o

One of the other Haiku developers had this [1] response to an inquiry about why Haiku is so fast: > The system is not all that well optimized, uses a 15 year old compiler which does not uses any modern CPU features, and by default, the kernel is built in debug mode which makes it much slower than it could be. > How do other operating systems still manage to feel slower? I have no idea. (Those kernel debug options are no joke, they are a massive slowdown. The ones for the TCP stack alone take network throughput down to 1/5 of what it is without it; the ones for SMP, the virtual memory manager, lock facilities, etc. combined make the system visibly less snappy. We disable these on beta builds, but they are enabled on nightlies, and back in 2011 they were on by default.) [1]: https://discuss.haiku-os.org/t/why-is-haiku-so-fast/6317 https://discuss.haiku-os.org/t/why-is-haiku-so-fast/6317