Performance testing is a testing practice performed to determine how a system performs in terms of responsiveness and stability under a particular workload. It can also serve to investigate, measure, validate or verify other quality attributes of the system, such as scalability, reliability and resource usage.
Read the following articles:
- https://en.wikipedia.org/wiki/Software_performance_testing
- https://msdn.microsoft.com/en-us/library/bb924357.aspx
NOTE: Instructor will discuss with the class individual types of performance testing activities and what their goals/benefits are. Examples will be given for all of them (so write them down).
Answer the following questions:
- What are the different purposes of performance testing
- Which questions are important for a performance specification
- Discuss with the class and instructor the following examples
Profiling tools (among others) may be used to measure performance of individual components like functions. For more information see:
- http://atodorov.org/blog/2014/11/05/performance-profiling-in-python-with-cprofile/
- http://atodorov.org/blog/2015/12/23/interesting-ruby-resources/
- http://atodorov.org/blog/2014/11/05/speeding-up-celery-backends/
- http://atodorov.org/blog/2014/11/07/speeding-up-celery-backends-part-2/
- http://atodorov.org/blog/2014/11/11/speeding-up-celery-backends-part-3/
For more examples of simple performance tests see:
- http://atodorov.org/blog/2013/02/05/performance-test-md5-sha1-sha256-sha512/
- http://atodorov.org/blog/2013/02/26/performance-test-amazon-ebs-vs-instance-storage-pt1/
- http://atodorov.org/blog/2013/06/26/performance-test-amazon-elasticache-vs-amazon-s3/
- http://atodorov.org/blog/2014/11/19/speed-comparison-of-web-proxies-written-in-python-twisted-and-go/
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Create a simple performance test to measure which Crypt class from Apache Commons Codec is faster. Classes can be found under
commons-codec/src/main/java/org/apache/commons/codec/digest -
HINT: Use one of the solutions at: http://stackoverflow.com/questions/3382954/measure-execution-time-for-a-java-method/3383047
- Your application under test is GitHub
- It is generally accepted that there are 10 million user accounts on GitHub
- Work in small groups
- Make a list of which of all GitHub features need to be performance tested the most
- Discuss with other groups and instructor your lists
- Select one of the features from your list to work on
- Create a performance test plan for the chosen feature
- what performance test types are you going to use
- what information do you expect to produce from them
- HINT: Ask instructor for a simulated arhitecture overview of GitHub