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Stress Testing as a Culture @joaomdmoura gioco.pro

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1,600,000,000.00 USD

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1 Second

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1 Second

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500 ms extra load time on results

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500 ms extra load time on results drop in traffic 20% =

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0% 10% 20% 30% 40% 0 2 4 6 8 10 Loadtime in seconds Page abandonment increase

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0% 10% 20% 30% 40% 0 2 4 6 8 10 Loadtime in seconds Page abandonment increase

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expect a web page to load in 2 seconds or less 47%

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would not return if it took longer than 4 seconds 75%

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“Information stored in our short-term memory decays quickly, which is why we don’t perform as well when we have to wait (…) And after 10 seconds? You can pretty much forget about it. Literally.” Our need for web speed: It’s about neuroscience http://www.webperformancetoday.com/2012/03/21/neuroscience-page-speed-web-performance/

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Performance per·for·mance: execution of an action

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João M. D. Moura @joaomdmoura gioco.pro

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Stress Testing as a Culture

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?

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Why and how increase the success rate of my application to meet the needs related to scale?

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largest city in the Americas

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largest city in the Americas

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largest city in the Americas the most populous city of the southern hemisphere

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Stress Test

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15 requests 1 minute

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1 requests 4 seconds

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3 successfully responses

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9456 ms average time of response

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How to approach?

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Treat performance as a critical matter alongside design, development, and marketing.

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Set Stress Goals!

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•Optimize an existing feature or asset on the page.

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•Optimize an existing feature or asset on the page. •Remove an existing feature or asset from the page.

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•Optimize an existing feature or asset on the page. •Remove an existing feature or asset from the page. •Don’t add the new feature or asset.

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80 Golden Rule

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80 Golden Rule

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20 80 Low effort big impact

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20 80 Low effort big impact

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20 80 Low effort big impact Front End Back End

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Mobile First Performance

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Billion people online Smartphones 1995 2000 2014 3.5

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0% 25% 50% 75% 100% 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 No Smartphone No Internet

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10 seconds on GPRS

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< 500ms

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Types of Stress Load Test

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Types of Stress Load Performance Test

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Types of Stress Load Performance Test

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Types of Stress Load Performance Test

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Stress

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Clients per Second Stress

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Clients per Second Maintain Client Load Stress

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Clients per Second

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Clients per Second

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Maintain Client Load

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Maintain Client Load

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5 requests per Second

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What tools to use?

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Apache Bench

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Apache Bench JMeter

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Apache Bench JMeter Tsung

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Apache Bench JMeter Tsung HTTPerf

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Apache Bench JMeter Tsung HTTPerf HTTPload

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Apache Bench JMeter Tsung HTTPerf HTTPload Trample

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Loader.io

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A free load testing service to stress test your web-apps & apis with thousands of concurrent connections.

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10,000 clients / test

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Culture!

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What it means?

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TDD TDD

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TDD TDD BDD BDD

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TDD TDD BDD BDD *DD *DD

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Integrate it within your deployment process

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We can do this!

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And the World Cup?

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3 successfully responses

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9456 ms average time of response

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1. Created missed indexes

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2. Changed database architecture & relationships

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3. Refactored tons of code

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4. Background Jobs

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5. Cache, for real! * but do it right *

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Wrap up!

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Wrap up! 1. Set goals, stick to it

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Wrap up! 1. Set goals, stick to it 2. Types of tests

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Wrap up! 1. Set goals, stick to it 2. Types of tests 3. Choose a tool

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Wrap up! 1. Set goals, stick to it 2. Types of tests 3. Choose a tool 4. Make it a culture

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Open Source

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ActiveModel::Serializers Open Source

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Ask me for Stickers!

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RubySource

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João M. D. Moura @joaomdmoura gioco.pro Thank You!