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NANOG Meeting Presentation Abstract

Measuring & Mitigating Web Performance Bottlenecks in Broadband Access Networks
Meeting: NANOG60
Date / Time: 2014-02-10 11:30am - 12:00pm
This item is webcast
Room: Peachtree Ballroom
Presenters: Speakers:

Srikanth Sundaresan, Georgia Tech

Srikanth is a final-year PhD student at the College of Computing, Georgia Tech, where he works with Professor Nick Feamster. His research interests include network management, measurements, and routing protocols. Currently his work centers on understanding the characteristics of home and broadband networks, and their effect on application performance. He leads the BISmark project.
Abstract: We measure Web performance bottlenecks in home broadband ac- cess networks and evaluate ways to mitigate these bottlenecks with caching within home networks. We first measure Web performance bottlenecks to nine popular Web sites from more than 5,000 broadband access networks and demonstrate that when the downstream throughput of the access link exceeds about 16 Mbits/s, latency is the main bottleneck for Web page load time. Next, we use a router-based Web measurement tool, Mirage, to deconstruct Web page load time into its constituent components (DNS lookup, TCP connection setup, object download) and show that simple latency optimizations can yield significant improvements in overall page load times. We then present a case for placing a cache in the home net- work and deploy three common optimizations: DNS caching, TCP connection caching, and content caching. We show that caching only DNS and TCP connections yields significant improvements in page load time, even when the user’s browser is already performing similar independent optimizations. Finally, we use traces from real homes to demonstrate how prefetching DNS and TCP connections for popular sites in a home-router cache can achieve faster page load times.
Files: youtubeMeasuring & Mitigating Web Performance
pdfMeasuring & Mitigating Web Performance Bottlenecks(PDF)
Sponsors: None.

Back to NANOG60 agenda.

NANOG60 Abstracts

  • Datacenter Track
    Moderators:
    Martin Hannigan, Akamai Technologies, Inc.; Daniel Golding, Iron Mountain;
  • Datacenter Track
    Moderators:
    Martin Hannigan, Akamai Technologies, Inc.; Daniel Golding, Iron Mountain;
  • BGP 101
    Speakers:
    Dawit Birhanu, Cisco Systems;
  • BGP 102
    Speakers:
    Dawit Birhanu, Cisco Systems;

 

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