1. In a networked computer system having a first source processor coupled to a second destination processor, a method for processor communication comprising the steps of: a first source processor sending an unrequested first instruction to a second processor; the second destination processor monitoring and executing the first instruction; the first source processor sending an unrequested second instruction representing the first instruction to the second destination processor, wherein the second instruction comprises an unaltered instruction or a short instruction depending on a difference determined by the first source processor by comparing the first instruction against data provided in a locally-accessible storage, the first instruction being sent by the first source processor to the second destination processor effectively on a non-repetitive basis; and the second destination processor monitoring and executing the first instruction.