Hi, It's very interesting. I'm testing my patch that replaces cygwin BSD socket functions with winsock2 API. And that tends to improves x11perf about score 5%-150%. http://peppermint.jp/temp/winsockx-20041110-0117.diff But yours seems to be much better. I'll look at it. -- Kensuke Matsuzaki mailto:zakki@peppermint.jp http://peppermint.jp