On: Alex Gaynor - Thoughts on HipHop PHP

[wmf]

I/O is slow if you actually do any, but RAM is so cheap that many Web sites shouldn't need much I/O.

[nixy → wmf]

I think that by I/O in this case people mean network I/O, not disk I/O.

Edit: Sorry, maybe I was jumping to conclusions. Databases and files are of course not always cached in-memory.