  Several recently proposed techniques achieve latency reduction by trading it
off for some amount of additional bandwidth usage. But how would one quantify
whether the tradeoff is actually beneficial in a given system? We develop an
economic cost vs. benefit analysis for answering this question. We use the
analysis to derive a benchmark for wide-area client-server applications, and
demonstrate how it can be applied to reason about a particular latency saving
technique --- redundant DNS requests.
