There's no case for this usually marginal speed benefit. Most programs are dealing with vastly slower bottlenecks. Like network or disk latency. IPC latency is

There's no case for this usually marginal speed benefit. Most programs are dealing with vastly slower bottlenecks. Like network or disk latency. IPC latency is so far down the list of priorities in terms of things to optimize. Not to mention that regular user-kernel-user buffer copying is plenty fast now, especially since the buffers will likely be cache-resident. Zero-copy is mostly hype without performance numbers to back it up. Don't need this complex message sealing mechanism.