Website performance optimization QA
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Website performance optimization QA

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Website performance optimization QA Website performance optimization QA Presentation Transcript

  • Web performance optimization Dudayev Denis
  • What I will talk • Why we should care about performance? • What we should use? • How to add performance to your workflow?
  • Why we should care about performance? “If it is fast and ugly, they will use it and curse you, if it is slow, they will not use it.” “Professor Billionaire“ Devid Cheriton
  • Performance evaluation parameters • Server side – Time of rendering page – Count of requests in second – Amount of data transmitted • Client side – Page processing on the client – Downloading content time – Awaiting time
  • Performance profiling areas • Client side – Request – Downloading – Rendering • Server side – Response – Algorithm – Memory – SQL Server
  • Requirements for performance • What are we going to test? (goals) • Setup requirements: – TTFB andor TTLB – RPS + number of users – Frequency of references to external resources (database, other services, etc.) – etc.
  • Anatomy of a web page • DNS resolution • TCP connection • Send request • Wait for response • Download response • Parse (DOM, CSSOM) • Execute JS/Apply CSS • Render Network Server Client
  • Introduce to load testing • Performance testing • Capacity testing • Testing to stress the system or find its limits • Load testing • etc
  • Testing plan • Create a test scenario • Setup the test • Performing the test • Analysis of results
  • Load testing tools • Free/Open source – JMeter (Apache) – LoadUI (SmartBear) – etc. • Commercial – LoadRunner (HP) – WebLOAD – etc.
  • We chosen JMeter • It has a respect • It free and open source • It has big community • We made the first easy demo project • We have support
  • JMeter Demo
  • Profiling • VS Performance Analyzer (MS) • dotTRACE (JetBrains) • ANTS Performance Profiler (Redgate) • SQL Server Profiler • etc.
  • How to add performance to your workflow? • Reasons (e.g. POQA is unsatisfied) • We have available time and near no a release • Prepare for battle Process: Searching for dips -> Fixing step by step