Profile PHP Performance with XDebug and XHProf
•
2 likes•977 views
This document discusses profiling PHP applications. It defines profiling as dynamic program analysis that measures things like memory and CPU usage. It covers both static analysis tools that analyze code structure and dynamic profilers like Xdebug and XHProf that gather data by executing programs. Xdebug and XHProf are introduced as common profiling extensions for PHP. XHProf is highlighted as a lightweight passive profiler with a web GUI called XHGui for reviewing profiling data. Profiling is presented as useful for debugging performance issues and gaining insight into an application's behavior.
Recommended
More Related Content
Similar to Profile PHP Performance with XDebug and XHProf
Similar to Profile PHP Performance with XDebug and XHProf (20)
Recently uploaded
Recently uploaded (20)
Profile PHP Performance with XDebug and XHProf
- 1. PROFILING PHP A DIVE INTO YOUR APPLICATION /DennisdeGreef @dennisdegreef PHPBeneluxConference2015
- 3. WIKIPEDIA profiling is aform of dynamicprogramanalysis thatmeasures, for example, the space (memory) or time complexityof a program, the usage of particular instructions, or the frequency and durationof functioncalls. Mostcommonly, profiling information serves to aid program optimization.
- 4. SO... DYNAMIC PROGRAM ANALYSIS?
- 5. YEAH... LETS FIRST LOOK AT IT'S COUNTERPART...
- 7. WIKIPEDIA Staticprogramanalysis is the analysis of computer software that is performed without actuallyexecuting programs The term is usuallyapplied to the analysis performed byan automated tool, with human analysis beingcalled program understanding, program comprehension or code review.
- 8. STATIC ANALYSIS TOOLS There are asetof tools which perform static code analysis. These tools can be integrated within an automated build. PHP Mess Detector PHP Copy/Paste Detector PHP CodeSniffer PHP Dead Code Detector There is anice page containingapredefined setof tools for a build to be found atJenkins PHP
- 9. BUT...
- 10. THESE TOOLS ONLY ANALYSE HOW YOUR CODE IS STRUCTURED, NOT HOW IT BEHAVES.
- 11. DYNAMIC ANALYSIS
- 12. WIKIPEDIA The analysis of computer software thatis performed by executing programs ona real or virtual processor. For dynamic program analysis to be effective, the targetprogram mustbe executed with sufficient test inputs to produce interestingbehavior. Use of software testingmeasures such as code coverage helps ensure thatan adequate slice of the program's setof possible behaviors has been observed.
- 13. CALLSTACK Acallstack is the order in which statements are exectuted. An example commonlyknown, is an exceptiontrace. This trace shows allthe statements executed before an exception is thrown.
- 14. CALLGRAPH Acallgraph is avisual representationof acallstack. In large applications this graph can give you better insight on how an application is wired.
- 15. PROFILING DATA Usually, the datagathered with aprofiler can be represented in stacks or graphs. Theycan include information regardingmemory- and cpu-usage.
- 16. WHY?
- 17. REASONS DebuggingCPUperformance Debuggingmemoryperformance DebuggingIO performance See which function is called how manytimes Gain insightof the black box thatis the application
- 18. REASONS We live in adigitalage where we wanteverythinginstantly. Accordingto a , 51 percentof online shoppers in the U.S claimed if asite is too slow theywillnot complete apurchase. Nowadays, search engine indexingalso accounts for page load. case studyfrom Radware Thepsychologyofwebperformance SEO101:Howimportantissitespeedin2014? CasestudyfromRadware
- 19. WARNING! Premature optimization is the rootof all evil -- Donald Knuth Onlyperform optimization when there is aneed to.
- 20. CAUSE OF ISSUES
- 21. COMMON ISSUES Network slowdown Datastore slowdown Externalresources (API, Filesystems, Network sockets, etc) Bad code(tm)
- 23. ACTIVE PROFILER Used duringdevelopment Gather more information than passive profilers (like variables/values) Performance impactis bigger Should _NOT_be used in production Example: Xdebug
- 24. PASSIVE PROFILER Minimalimpacton performance Gathers less butsufficientinformation to diagnose issues (Onlyrecords function calls and cpu + mem) Examples: , ,XHProf New Relic Blackfire.io
- 25. XDEBUG
- 26. XDEBUG Generates files (like Valgrind for C) Can be analysed byKCacheGrind amongothers Cachegrind files are relativelybigin size Also adeveloper toolfor breakpoints and remote debugging Active profiler cachegrind
- 33. XHPROF
- 34. XHPROF Developed byFacebook and released as open-source in 2009 PECL extension Lightweightfor beingapassive profiler Includes webguifor reviewingand comparingprofilingdata
- 37. CALLSTACK
- 38. CALLGRAPH
- 39. CALLGRAPH
- 40. CALLGRAPH
- 41. USEFUL TOOLS Sets $_COOKIE['_profile'] to 1 XHProf Helper for Chrome XHProf Helper for Firefox
- 42. XHGUI Web frontend for profile data Requires MongoDB Shows callstacks Shows callgraphs Can compare differentruns
- 43. XHGUI
- 44. XHGUI
- 45. XHGUI COMPARE
- 46. XHGUI COMPARE
- 48. XHGUI CALLSTACK
- 49. LINK0
- 50. LINK0/PROFILER Focused on XHProf Has multiple persistence layers for storingprofiles Memory Flysystem ZendDbAdapter MongoDB(work in progress) Available on composer/packagist FullyObject-orientated 100%code coverage http://github.com/link0/profiler
- 51. GETTING STARTED Bootstrappingthe profiler $profiler=newLink0ProfilerProfiler(); $profiler->start(); print_r($profiler->stop()); AddingaPersistenceHandler profiler=newLink0ProfilerProfiler( $persistenceHandler=newLink0ProfilerPersistenceHandlerMemoryHandler(); $ $persistenceHandler); Flysystem example filesystem=newLink0ProfilerFilesystem( persistenceHandler=newLink0ProfilerPersistenceHandlerFilesystemHandler( profiler=newLink0ProfilerProfiler( $filesystemAdapter=newLeagueFlysystemAdapterLocal('/tmp/profiler'); $ $filesystemAdapter); $ $ $persistenceHandler);
- 53. SOME IDEAS Enable on production with sampling Aggregate allprofiles to centralized machine/cluster Integrate into continuous deployment Run profilingon acceptance environment Alertwhen compared differences surpass threshold Codeception integration Find business use-cases thatare slow Make acase for refactoringto the business Focus on the customers emulated experience
- 54. ANY QUESTIONS?
- 55. QUESTIONS? I <3 FEEDBACK Joind.in: GitHub: Twitter: IRC: link0 on Freenode https://joind.in/talk/view/13420 http://github.com/dennisdegreef @dennisdegreef SLIDES ARE ALSO ON JOIND.IN
- 56. USEFUL LINKS ProfilingPHP with PhpStorm and Xdebug ProfilingPHP with PhpStorm and Zend Debugger XDebugProfiler documentation XHProf PHP documentation Profilingwith XHProf and XHGui http://github.com/link0/profiler