1. How to stress test your application with Gatling ?
Paris, October 17th 2012

2. Why a new tool ?

5. Issue n°1:
High performance
http://www.shopfbparts.com/catalog/nal-19201331_w.jpg

6. 1 user = 1 thread

7. With 50 threads on a JVM
http://www.ausmotive.com/F1/2010/British-GP-05.jpg

8. With 2000 threads on a JVM

9. Blocking IO

10. That's what your threads will do most of
the time, waiting ...
http://www.flickr.com/photos/carlotancredi/3447589391

11. ... and sleeping
http://www.flickr.com/photos/maciejdakowicz/4770794503

12. Is that a real problem?

13. Can you trust your results?
JMeter 2.8 perf test, expecting 300 tr/sec
http://wiki.apache.org/jmeter/JMeterPerformance?action=AttachFile&do=get&target=Transactions-2.8.png

14. Issue n°2:
Usability

15. Graphical Interface
Listen, it's actually
not complicated ...
http://www.spacebio.uni-bonn.de/ahp/Parabel/Par_Images/240304-Cockpit_BIG.jpg

16. Issue n°3:
Maintenance

17. What was this change about ?

18. Listen to us,
Gatling can change
all that !
http://static.lexpress.fr/medias/15/mai-68_124.jpg, copyright by AFP

19. Say hello to my little friend ...

20. version 1.3.3
Released mid-October 2012

21. Be asynchronous,
embrace the actors model

22. Don't use blocking IO
> Netty
> Async-Http-Client

23. Scenario
= Code
= DSL
http://gringocentralsanramon.blogspot.ch/2012/02/getting-published-writing-seminar-wed.html

24. Easy

25. Feeling lazy? Try the recorder.

26. Powerful : write your own Scala code

27. But, many used case covered out-of-
the-box by the DSL
● .regex() / .css() / .xpath() / jsonPath()
● .find() / .findAll() / .count()
● .is() / .in() / .not / .whatever
● .doIf() / .repeat() / .during() / .
asLongAs()
● .tryMax() / .exitBlockOnFail()
● .randomSwitch() / .roundRobinSwitch()
● .feeder() : csv() / tsv() / jdbc()

28. Integrations :
> Maven plugin
> Maven archetype / run in the IDE
> Graphite live reporting

29. Coming soon :
> Jenkins plugin
> Requests grouping
> Clustering

30. Fact sheet
● First commit in june 2011
● Created by S. Landelle and R. Sertelon
● About 20k LOCs
● 21 persons have contributed to the project
● 2500 downloads since the beginning
● 650 downloads of Gatling 1.2.5

31. Really efficient?
JMeter perf test run with Gatling, expecting 300 tr/sec

32. http://gatling-tool.org
http://github.com/excilys/gatling
http://twitter.com/GatlingTool
http://github.com/slandelle
http://twitter.com/slandelle