The User and Business Impact of Server Delays, Additional Bytes, and HTTP Chunking in Web Search

Web Performance
Location: Regency Ballroom Level: Novice
Average rating: ****.
(4.26, 34 ratings)

We took very small percentages of our users and slowed the page down in several ways

  • Added server side delays
  • Added additional page weight to different parts of our page
  • Added client side rendering delays

We then measured how each of these changes impacted metrics like clicks, time to click, repeat site usage, queries per visit, revenue, etc.

This talk is to share the results.

Photo of Eric Schurman

Eric Schurman


Eric Schurman has been working with the web since the early versions of NCSA Mosaic. He’s currently at as a Principal Engineer working on latency. Prior to that he worked at Microsoft on projects ranging from’s search to the home page and Download Center. His experiences writing books on web development, working with disabled users, and teaching classes in computer use have given him a passion for doing the right thing for the customer.

Photo of Jake Brutlag

Jake Brutlag


Jake Brutlag is a data analyst with 10 years of industry experience,
first at Microsoft, then at Google. He has published papers on
distinct value estimation, email classification, aberrant behavior
detection for network time series, and search engine latency.

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chronis tsempelis
06/30/2009 8:19pm PDT

Great presentation and nice way of analysis of both the companies its great to see both Google and Microsoft together

Picture of Ben Rushlo
Ben Rushlo
06/23/2009 3:37am PDT

Great presentation. Connecting the dots between business outcomes and performance. Great!

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