| Summary: | We characterize high-performance streaming applications as a new and distinct domain of programs that is becoming increasingly important. The StreaMIT language provides novel high-level representations to improve programmer productivity and program robustness within the streaming domain. At the same time, the StreaMIT compiler aims to improve the performance of streaming applications via stream-specific analyses and optimizations. In this paper, we motivate, describe and justify the language features of StreaMIT, which include: a structured model of streams, a messaging system for control, a re-initialization mechanism, and a natural textual syntax. We also present a means of reasoning about time in terms of "information flow": a concept that we believe is fundamental to the streaming domain. Using this concept, we give a formal semantics for StreaMIT's messaging system, as well as a simple algorithm for detecting deadlock and buffer overlow.
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