Stress Test as a Culture
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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 msextra load time on results
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500 msextra load time on results drop in traffic
20%=
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expect a web page to load in 2 seconds or less47%
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would not return if it took longer than 4 seconds75%
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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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Performanceper·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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80Golden Rule
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80Golden Rule
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2080Low effort big impact
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2080Low effort big impact
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2080Low effort big impact
Front End Back End
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Mobile FirstPerformance
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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
StressLoad
Test
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Types of
StressLoad
Performance Test
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Types of StressLoad
PerformanceTest
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Types ofStressLoad
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 requestsper 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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TDDTDD
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TDDTDDBDDBDD
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TDDTDDBDDBDD*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 it2. Types of tests
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Wrap up!1. Set goals, stick to it2. Types of tests3. Choose a tool
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Wrap up!1. Set goals, stick to it2. Types of tests3. Choose a tool4. 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.proThank You!