This paper discusses the performance enhancement of an Explicit Token Store (ETS) architecture as a result of the introduction of hierarchical memory system. It indicates how locality can be exploited in a dataflow environment and evaluates a novel cache subsystem design f o r this purpose. The introduction of an operand cache and an instruction cache, cause a performance enhancement, remarkable enough, to justify their cost. The paper explores various Optimizations and resource management schemes to enhance performance further and discusses the costs and trade-08s involved. Some of the ideas discussed in this paper f o r the E T S architecture are applicable to many finegrained multithreaded architectures