Methods, apparatus, systems and articles of manufacture are disclosed to improve interprocess communication. An example apparatus to improve network transmission efficiency of a sending peer includes an encoder interface to prevent an encoder from encoding data in a native format to a target format associated with a requesting peer in response to a transmission trigger, a composite interface description (CID) engine to generate architecture agnostic metadata of the data in the native format, a composite layout description (CLD) engine to generate architecture specific metadata of the data in the native format, the architecture specific metadata identifying offset values associated with elements of the data in the native format, and a client payload engine to improve the network transmission efficiency by sending unencoded data combined with the architecture agnostic metadata and the architecture specific metadata to the requesting peer having an architecture different than that of the sending peer.