Web and App Performance: Top Problems to avoid to keep you out of the News
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As presented at Boston and NYC Web Perf Meetup. Its time to level up Web Performance Optimization started by Steve Souders. We need to look beyond the rim of the browser as there are many problems happenig from browser to database. In this presentation I showed how Browser Diagnostics needs to evolve into End-to-End Application Diagnostics and Monitoring. Showing 5 real life examples on why applications failed and the metrics to look at to identify these problems early on
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Web and App Performance: Top Problems to avoid to keep you out of the News
- 1. Web/App Performance How to keep you out of the News Tech Blogs on http://blog.dynatrace.com Free Tools on http://ajax.dynatrace.com Hosted by: Andreas Grabner - @grabnerandi 1 @Dynatrace
- 2. That’s why I ended up talking about performance 2 @Dynatrace
- 3. 3 @Dynatrace
- 4. 4 @Dynatrace
- 5. 0.01% Web Server 99.9% Backend 5 @Dynatrace
- 6. http://ajax.dynatrace.com New Tools for App Performance Optimization! Browser Diagnostics++ User Experience Management Application Monitoring Continuous Delivery For Test, Dev, Ops & Business 4.5 6 @Dynatrace
- 7. But now back to WHY we are here TODAY… 7 @Dynatrace
- 8. Nobody wants this … 8 @Dynatrace
- 9. Unless you work for Google or Microsoft 9 @Dynatrace
- 10. Nor this … 10 @Dynatrace
- 11. 11 @Dynatrace
- 12. As it leads to this … 12 @Dynatrace
- 13. The “War Room” Facebook – December 2012 13 @Dynatrace
- 14. And potentially to this … 14 @Dynatrace
- 15. 15 @Dynatrace
- 16. And this … 16 @Dynatrace
- 17. 17 @Dynatrace
- 18. And that’s why Business doesn’t like it either … 18 @Dynatrace
- 19. YES we know this 80%Dev Time in Bug Fixing $60B Defect Costs BUT ~80% of problems caused by ~20% patterns 19 @Dynatrace
- 20. 5 Situations on WHY this happened, HOW to avoid it 20 @Dynatrace
- 21. 21 @Dynatrace
- 22. #Push without a Plan 22 @Dynatrace
- 23. Mobile Landing Page of Super Bowl Ad 434 Resources in total on that page: 230 JPEGs, 75 PNGs, 50 GIFs, … Total size of ~ 20MB 23 @Dynatrace
- 24. m.store.com redirects to www.store.com ALL CSS and JS files are redirected to the www domain This is a lot of time “wasted” especially on high latency mobile connections 24 @Dynatrace
- 25. Fifa.com during Worldcup http://apmblog.compuware.com/2014/05/21/is-the-fifa-world-cup-website-ready-for-the-tournament/ 25 @Dynatrace
- 26. # Images # Redirects Size of Resources 26 @Dynatrace
- 27. 27 @Dynatrace
- 28. #“Blindly” (Re)use Existing Components 28 @Dynatrace
- 29. Requirement: We need a report 29 @Dynatrace
- 30. Using Hibernate results in 4k+ SQL Statements to display 3 items! Hibernate Executes 4k+ Statements Individual Execution VERY FAST But Total SUM takes 6s 30 @Dynatrace
- 31. # SQL Executions # of SAME SQLs 31 @Dynatrace
- 32. 32 @Dynatrace
- 33. Architectural Decisions gone Bad 33 @Dynatrace
- 34. We wanted Web 2.0 and Mobile Ready! 34 @Dynatrace
- 35. 35 @Dynatrace
- 36. 36 @Dynatrace
- 37. # Items per Page # AJAX per Page 37 @Dynatrace
- 38. 38 @Dynatrace
- 39. Don’t assume You know the environment 39 @Dynatrace
- 40. Distance Calculation Issues 480km biking in 1 hour! Solution: Unit Test in Live App reports Geo Calc Problems Finding: Only happens on certain Android versions 40 @Dynatrace
- 41. 3rd Party Issues Impact of bad 3rd party calls 41 @Dynatrace
- 42. # Functional Errors 3rd Party calls 42 @Dynatrace
- 43. 43 @Dynatrace
- 44. Deployment gone bad 44 @Dynatrace
- 45. Test Environment Production Environment 8x slower 3x more SQL 45 @Dynatrace
- 46. Test Environment Production Environment Hibernate, Hibernate, Classloading, XML – The Key Classloading, XML – The Key Hotspots I/O for Web Requests Hotspots doesn’t even show up! That’s Normal: Having I/O for Web Request as main contributor 46 @Dynatrace
- 47. Top Contributor Class.getInterfaces Called from Hibernates FieldInterceptionHelper These calls all originate form thousands of calls to find item by code 47 @Dynatrace
- 48. Time Spent in API # Calls into API 48 @Dynatrace
- 49. 49 @Dynatrace
- 50. #No “Agile” Deployment 50 @Dynatrace
- 51. Load Spike resulted in UnavailabilityAd on air 51 @Dynatrace
- 52. Alternative: “GoDaddy goes DevOps” 1h before SuperBowl KickOff 1h after Game ended 52 @Dynatrace
- 53. # of Domains Total Size 53 @Dynatrace
- 54. Consider these Metrics • # Images • # Redirects • Size of Resources • # SQL Executions • # of SAME SQLs • # Items per Page • # AJAX per Page •Time Spent in API • # Calls into API • # Functional Errors • 3rd Party calls • # of Domains •Total Size 54 @Dynatrace
- 55. (R)Evolutionize Web Performance Optimization Unit & Integration Tests Commit Stage • Compile • Execute Unit Test • Code Analysis • Build installers Automated Acceptance Testing Performance Tests Automated Capacity Testing Production Monitoring Manual testing • Key showcases • Exploratory testing Release Functional Tests 55 @Dynatrace
- 56. 56 @Dynatrace
- 57. Example from Web Diagnostics 282! Objects 9.68MB Page Size on that page 8.8s Page Load Time Most objects are images delivered from your main domain Very long Connect time (1.8s) to your CDN 57 @Dynatrace
- 58. Example from Server-Side Diagnostics 526s to render that report 1 SQL running 210s! Lots of time spent in logging to Log4J Lots of time spent in rendering 58 @Dynatrace
- 59. Online Performance Clinics Every Other week @ bit.ly/onlineperfclinic 59 @Dynatrace
- 60. “Share Your PurePath” bit.ly/sharepurepath Your Benefits • Free Performance Review • Extended Dynatrace License My Benefits • More blog material for next year • Gratification that I could help you 60 @Dynatrace
- 61. Questions and/or Demo Get Tools: http://ajax.dynatrace.com Contact Me: agrabner@dynatrace.com Follow Me: @grabnerandi Read More: http://blog.dynatrace.com 61 @Dynatrace
- 62. 30 Days Dynatrace Free Trial • Get it here: http://ajax.dynatrace.com • YouTube Tutorials: http://bit.ly/dttutorials • Live Q&A Sessions: http://bit.ly/onlineperfclinic • Contact me: agrabner@dynatrace.com – Follow Me: @grabnerandi •Special Offer: • Lifetime license for Browser Diagnostics • 180 Days for End-To-End 62 @Dynatrace
- 63. Andreas Grabner Dynatrace Developer Advocate @grabnerandi http://blog.dynatrace.com 63 @Dynatrace
Editor's Notes
- The Web Performance Optimization (WPO) movement made a huge impact in optimizing the web apps we build. But in 2014 this is no longer enough. With Mobile Apps and Applications that rely on backend services, 3rd party services, distributed across the globe in physical or virtual data centers requires developers to not just focus on web performance in their browser but end-to-end performance of their application
- My professional background: worked in performance for past 15 years. Segue, Borland, dynaTrace, Compuware, Dynatrace
- With dynaTrace AJAX Edition we solved a problem in the early days of Web Performance Optimization as there were no good tools available on Internet Explorer or Firefox. Endorsements by Steve Souders and John Resig helped to make it well known in the WPO community
- By now there are many great free tools out there: dynaTrace AJAX Edition, speedtracer, yslow, pagespeed, … - all do a great job in analyzing frontend performance – and based on Steve Souders that’s where 80% of your performance is Which is true for most landing pages of websites and those that have been built leveraging the browser as an application platform. BUT – it is not true for many critical pages or backend heavy applications such as eCommerce checkouts, …
- Some critical steps in an application are just very heavy on the server side – such as generating reports, getting your user history, order status, notifications, … In this example we talk about an online room reservation system where generating the overview of available meeting rooms takes between 60 and 120s. The problem however lies in the backend implementation due to some bad implementations causing thousands of SQL queries to be executed and too much data loaded into memory causing high GC. Rendering that page in the browser only takes a fraction of the total time
- That’s why we are happy to announce the availability of the next (r)evolutionary step when it comes to web performance optimization. We have a new version of AJAX Edition available but also now provide the same level of diagnostics not only in the browser but also end-to-end with our Dynatrace 6.1 Application Monitoring and User Experience Management. You can get both tools from http://ajax.dynatrace.com