Is FreeBSD, or even newer versions of NetBSD. FreeBSD will busy wait on sleeping, so you get more accurate timing. Linux is okay, but I don’t really like using it for game server hosting due to each kernel having newer bu… err features than previous ones.

The problem with any of the linux binaries is they consume large amounts of CPU compared to their windows counterparts, plus they aren’t as optimized. Alfred from VALVe spoke with me and said they won’t move to a newer GCC because it breaks so many mods.