Scalability vs. Performance

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Size & Speed Scalability vs. Performance NY Web Performance Meetup March 27, 2013

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About • Doing web dev and operations since 1996 • Tech Director, Web Ops and Dev @ truTV/Turner • Creator of ShowSlow • Organizer at NY WebPerf • Board member of WPO Foundation

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Why Do We Scale?

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Available Resources CPU Memory Disk Network

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CPU & Memory • Classical scale problem • Scale up (Moor's law) • Scale out (cloud)

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Storage • More available • Speed and reliability • Slower then in the past / SSD

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Network ??? • Easy to scale for static assets • Trouble if you hit dynamic

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User Experience

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How Page Loads ~8 sec above the fold ~0.5 sec for first request only 6.25% on back end 12sec, 157 req, ~1Mb http://bit.ly/pageload-video http://bit.ly/pageload-filmstrip

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Our Tools

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Load Testing apply load, measure backend performance degradation

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"Synthetic" testing time ALL components of page load HAR

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Real User Measurement measure key performance metrics for REAL users Boomerang.js

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Speed, is it important? RUM data. Aaron Kulick, Cliff Crocker @ Wallmart Labs

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Speed, it is important! RUM data. Aaron Kulick, Cliff Crocker @ Wallmart Labs

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Speed it up for one user!

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New York Web Performance Meetup Sergey Chernyshev @sergeyche @perfplanet