MAX_THREAD_IDS is defined as 128 in a file with a copyright notice of 2005, which was when the very first consumer dual core processors started getting released

MAX_THREAD_IDS is defined as 128 in a file with a copyright notice of 2005, which was when the very first consumer dual core processors started getting released: https://github.com/perilouswithadollarsign/cstrike15_src/blob/master/tier0/threadtools.cpp#L99 https://github.com/perilouswithadollarsign/cstrike15_src/blo... Entirely reasonable that no one in 2005 would even consider the possibility of 128 core processors. I bet nobody reconsidered or even looked at that code ever since, until it started breaking because of today's extremely parallel cpus starting to get somewhat affordable for consumers.