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If you are working on a serious project, you want it to scale. The thing about scale is, you only focus on it once you really need it. I’m the CTO of an soccer social network based in Brazil. To put it mildly, soccer is big in my country. This summer, we focused our marketing on the World Cup, preparing our application to support as many users as possible. To do that, we had to benchmark and improve, but how could we load test? What tool should we use? Those are just some questions that I'll go through in this talk, that will show youhot to address this challenge so stress test you app.
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Stress Testing as a Culture
@joaomdmoura gioco.pro
1,600,000,000.00 USD
1 Second
1 Second
500 msextra load time on results
500 msextra load time on results drop in traffic
20%=
0%
10%
20%
30%
40%
0 2 4 6 8 10
Loadtime in seconds
Page abandonment increase
0%
10%
20%
30%
40%
0 2 4 6 8 10
Loadtime in seconds
Page abandonment increase
expect a web page to load in 2 seconds or less47%
would not return if it took longer than 4 seconds75%
“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/
Performanceper·for·mance:
execution of an action
João M. D. Moura @joaomdmoura gioco.pro
Stress Testing as a Culture
?
Why and how increase the success rate of my application to meet the needs related to scale?
largest city in the Americas
largest city in the Americas
largest city in the Americas
the most populous city of the southern hemisphere
Stress Test
15 requests 1 minute
1 requests 4 seconds
3 successfully responses
9456 ms average time of response
How to approach?
Treat performance as a critical matter alongside design, development, and marketing.
Set Stress Goals!
•Optimize an existing feature or asset on the page.
•Optimize an existing feature or asset on the page.
•Remove an existing feature or asset from the page.
•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.
80Golden Rule
80Golden Rule
2080Low effort big impact
2080Low effort big impact
2080Low effort big impact
Front End Back End
Mobile FirstPerformance
Billion people online Smartphones
1995 2000 2014
3.5
0%
25%
50%
75%
100%
1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017
No Smartphone No Internet
10 seconds on GPRS
< 500ms
Types of
StressLoad
Test
Types of
StressLoad
Performance Test
Types of StressLoad
PerformanceTest
Types ofStressLoad
Performance
Test
Stress
Clients per Second
Stress
Clients per Second Maintain Client Load
Stress
Clients per Second
Clients per Second
Maintain Client Load
Maintain Client Load
5 requestsper Second
What tools to use?
Apache Bench
Apache Bench
JMeter
Apache Bench
JMeter
Tsung
Apache Bench
JMeter
Tsung
HTTPerf
Apache Bench
JMeter
Tsung
HTTPerf
HTTPload
Apache Bench
JMeter
Tsung
HTTPerf
HTTPload
Trample
Loader.io
A free load testing service to stress test
your web-apps & apis with thousands
of concurrent connections.
10,000 clients / test
Culture!
What it means?
TDDTDD
TDDTDDBDDBDD
TDDTDDBDDBDD*DD*DD
Integrate it within your deployment process
We can do this!
And the World Cup?
3 successfully responses
9456 ms average time of response
1. Created missed indexes
2. Changed database architecture & relationships
3. Refactored tons of code
4. Background Jobs
5. Cache, for real! * but do it right *
Wrap up!
Wrap up!1. Set goals, stick to it
Wrap up!1. Set goals, stick to it2. Types of tests
Wrap up!1. Set goals, stick to it2. Types of tests3. Choose a tool
Wrap up!1. Set goals, stick to it2. Types of tests3. Choose a tool4. Make it a culture
Open Source
ActiveModel::Serializers
Open Source
Ask me for Stickers!
RubySource
João M. D. Moura @joaomdmoura gioco.proThank You!
