Profiling PHP @ 4Developers 2016

You cannot improve what you cannot measure. That's why profiling applications should always be the first step before trying to improve its performance. Learn how to spot your applications' bottlenecks and how to adopt profiling into your developer pipeline. This presentation will introduce some PHP profiling tools such as XDebug or XHProf as well as Blackfire.io.

Transcript

1. Profiling PHP Sebastian Grodzicki
2. Sebastian Grodzicki CTO @ SHOWROOM
3. abandon a website that takes more than 3 seconds to load 40% of users
4. Amazon -100 ms = +1% revenue
5. Google +500 ms = -25% searches
6. – Steve Souders „80-90% of the end-user response time is spent on the frontend. Start There.” Performance Golden Rule
7. Profiling: a way to measure where a program spends time.
8. microtime()
9. Xdebug
10. xdebug.profiler_enable_trigger = 1 http://url?XDEBUG_PROFILE=1
11. KCachegrind
12. Webgrind
13. XHProf
14. <?php xhprof_enable(); # do some stuff $xhprof_data = xhprof_disable();
15. XHProf
17. Blackfire
18. There’s a Blackfire Edition for any developer
19. Blackfire Wall time I/O CPU Memory Network SQL
20. Time Wall time I/O CPU Disk I/O Network = = + +
21. Inclusive vs Exclusive Time function foo()
 {
 $str = bar(); return $str; } function foo()
 {
 $str = bar(); return $str; }
22. Continuous Performance Testing
23. Assertions
24. Test Scenarios
25. Callgraphs
26. Hot paths, exclusive time & inclusive time
27. Compare & iterate
28. DEMO
36. goo.gl/E2H1D6
37. blackfire.io/docs/24-days