Build resilient systems at scale
May 27–29, 2015 • Santa Clara, CA

Metrics, metrics everywhere (but where the heck do you start?)

Tammy Everts (SpeedCurve), Cliff Crocker (Akamai)
1:30pm–3:00pm Wednesday, 05/27/2015
Location: Ballroom CD
Average rating: ***..
(3.60, 40 ratings)
Slides:   external link

Prerequisite Knowledge

Some experience with and understanding of performance, from any of the perspectives (e.g. devops, design, executive, marketing) mentioned in the abstract.


What is performance? Depending on whom you ask, you’ll get a completely different definition.

  • If you’re a designer, performance is when your pages become usable.
  • If you’re in DevOps, performance is a set of numbers — from back-end time to DOM interactive to the load event.
  • If you’re a CEO or CRO, performance is revenue.

Not surprisingly, there’s no one-size-fits-all performance metric (though life would be simpler if there were). Different metrics will give you different critical insights into whether or not your pages are delivering the results you want — both from your end user’s perspective and ultimately from your organization’s perspective.

But regardless of your role, performance boils down to three simple questions:

  • How fast am I?
  • How fast should I be?
  • How do I get there?

In this session, we’ll walk through various metrics that answer performance questions from multiple perspectives. You’ll walk away with a better understanding of your options, as well as a clear understanding of how to choose the right metric for the right audience.

We’ll cover:

  • Types of events (browser standard, custom)
  • Timings (user, navigation, resource)
  • Behavioral events (time to scroll, time to click, time to convert)
  • Business key performance indicators (bounce rate, conversions, orders, order value, page views)
  • How to capture metrics for SPAs
  • Third-party measurement
  • Should you get your metrics from synthetic tests or RUM — or both?
  • Should you care about the metrics for some pages more than others?
  • What percentile should you care about? 50th? 95th?

We’ll also share a case study that demonstrates how to target specific metrics along specific parameters and tie it back to business outcomes — and ultimately business success!

Photo of Tammy Everts

Tammy Everts


As a senior researcher and evangelist at SOASTA, I research the technical, business, and human sides of web/application performance, and share the findings via countless blog posts, presentations, case studies, articles, and reports.

Tammy is the author of O’Reilly Media’s Time is Money. Learn more.

Photo of Cliff Crocker

Cliff Crocker


Cliff Crocker is VP of product for SOASTA, Inc. where he focuses on performance monitoring of web and mobile applications. Prior to joining SOASTA, Cliff led the performance, reliability and site analytics initiatives for @WalmartLabs. Cliff is an active participant in the web performance community, evangelizing the importance of correlating performance metrics with business intelligence to drive development efforts within e-commerce.

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Picture of Tammy Everts
Tammy Everts
05/27/2015 12:33pm PDT

Hi Kevin. Our slides are on Slideshare:

Picture of Jason Yee
Jason Yee
05/27/2015 7:41am PDT

The slides for sessions should be available from the speaker slides page soon.

Kevin Jones
05/27/2015 6:52am PDT

Hello, where can we get the slides for your presentation? Thanks.