Hacker News new | past | comments | ask | show | jobs | submit login

I think he missed the point on why kernel code are fast. Kernel code are fast not because it's written in C. It's fast because it doesn't do much. Most system calls into the kernel does very little; they just update some data structure and return. OS kernel is complicate because of its breadth and dependency and side effects. The call path of each call is actually fairly shallow.

Guidelines | FAQ | Support | API | Security | Lists | Bookmarklet | Legal | Apply to YC | Contact