Discovering & Solving Performance Issues

In this talk I show how to approach performance analysis during development, scaling your website and profiling in production. The second part of the talk discusses some general approaches for improving performance from upgrading to PHP 7 over optimizing performance in Doctrine entities/repositories to application- and HTTP-caching.

Transcript

1. DISCOVERING & SOLVING PERFORMANCE ISSUES
2. Quick overview, rather than detailed look What works for me, might not work for you Introduction to some tools Opinionated guide of practices WHAT TO EXPECT?
3. DENIS BRUMANN SensioLabs
 Berlin, Germany
 Developer @dbrumann
 denis.brumann@sensiolabs.de
4. SYMFONY WEB PROFILER
6. not shown, but also containing the web-profiler:
 symfony/debug-pack
9. {{ render(controller('App\\Controller\\GroupController::listAction')) }} {{ render(controller('App\\Controller\\EventController::listAction')) }}
15. How to Use the Profiler in a Functional Test https://symfony.com/doc/current/testing/profiling.html
17. It can be used to simulate a heavy load on a server, group of servers, network or object to test its strength or to analyze overall performance under different load types. https://jmeter.apache.org/
25. CAPACITY TEST
 Determine how many users and/or transactions a given system
 will support and still meet performance goals. LOAD TEST
 Verify application behavior under normal and peak load conditions. STRESS TEST
 Determine or validate an application’s behavior when pushed
 beyond normal or peak load conditions.
28. https://msdn.microsoft.com/en-us/library/bb924375.aspx
34. Decorate original ApiClient with PSR-6 Cache https://symfony.com/doc/current/service_container/service_decoration.html
37. TYPICAL PROBLEM GROUPS I/O Wait CPU-Usage Memory-Usage Network-Latency SQL-Queries
38. HOW TO IMPROVE PERFORMANCE?
39. PHP 7
43. DOCTRINE
44. http://docs.doctrine-project.org/projects/doctrine-orm/en/latest/reference/improving-performance.html METADATA & QUERY CACHES it is strongly discouraged to use Doctrine without a Metadata and Query cache (preferably with APC or Memcache as the cache driver). ALTERNATIVE RESULT FORMATS Make effective use of the available alternative query result formats like nested array graphs or pure scalar results, especially in scenarios where data is loaded for read-only purposes.
47. APPLICATION CACHE
48. HTTP CACHE & ESI
50. DISCOVERING PERFORMANCE PROBLEMS Overall performance & scalability? Unspecified performance issue on a specific page? Worker jobs & CLI tasks? Load & capacity tests using JMeter During development: Web Profiler In depth analysis: Blackfire Blackfire
51. GENERAL TIPS Measure first, then change Make changes in small increments Search for causes, not symptoms Verify assumptions & results with real data Revisit old assumptions
52. THANK YOU