Multiple TCP Connections Improve HTTP Throughput ? Myth or Fact?

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Executive Summary

The earlier research showed that HTTP over TCP suffers from aggravated Head-Of-Line (HOL) blocking in browsing conditions found in the developing world. The paper proposed a multistreamed transport such as SCTP to alleviate HOL blocking. Using emulations the paper showed that a single multistreamed SCTP association reduced HOL blocking and improved response times when compared to a single TCP connection. In this work the paper evaluates HTTP performance over multiple TCP connections vs. a single multistreamed SCTP association. While the paper expects multiple TCP connections to improve HTTP throughput, emulation results show otherwise. The paper finds that the competing and bursty nature of multiple TCP senders degrades HTTP performance in low bandwidth last hops.

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