Abstract: Examples include composing memory resources across devices and reducing transitional latency. In some examples, memory resources associated with executing one or more applications by circuitry at two separate devices may be composed across the two devices via use of a midstream buffer. The circuitry may be capable of executing the one or more applications using a hierarchical memory architecture including a near memory and a far memory. In some examples, near memories may be separately located at first and second devices and a far memory may be located at the first device. The near memory of the first device may be used as a midstream buffer to facilitate movement of data over a wired or wireless interconnect to or from the near memory of the second device.