The document discusses web and application performance, highlighting the importance of optimization tools and practices to avoid significant issues. It covers various factors affecting performance, such as excessive resource sizes, SQL execution inefficiencies, and third-party call problems, and emphasizes the need for thorough testing and monitoring. Additionally, it promotes Dynatrace resources and services for improving application performance management.

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