TCPSP
From LVSKB
TCPSP implements TCP splicing for the Linux kernel. TCP splicing is a technique to splice two TCP connections inside the kernel, so that data relaying between the two connections can be run at near router speeds. This technique can be used to speed up It can be used to speed up layer-7 switching, web proxy and application firewall running in the user space.
Software
TCPSP software page is at http://www.linuxvirtualserver.org/software/tcpsp/index.html