1.5.0 will be a big win for all users. It will be more flexible in the handling and will have huge improvement for static files thanks to async io. The following benchmarks shows a increase of 80% for the new linux-aio-sendfile backend compared the classic linux-sendfile one. The test-env is client: Mac Mini 1.2Ghz, MacOS X 10.4.8, 1Gb RAM, 100Mbit server: AMD64 3000+, 1Gb RAM, Linux 2.6.16.21-xen