The document discusses performance tuning during application development, highlighting the necessity of proactive approaches to uncovering performance issues before they escalate. It introduces XRebel as a tool for developers to receive immediate feedback on performance bottlenecks, enabling easier debugging and reduction of technical debt. Key features include application profiling, database insights, and monitoring of exceptions, aimed at improving code quality and agility.

1. Real time insight, faster apps.

2. In this deck:
• Introduction to performance tuning during development
• XRebel demo
• Q&A

3. Development CI QA Production
Cost$$$
Staging
Time
Cost of fixing issues in different phases of development

4. When do you think about
performance issues?
QA Staging Production
Performance tests
revealed bottlenecks!
The process is reactive
It’s too late! $$$
Hey, the app
looks slow
We are in trouble!

5. Top performance issues
http://zeroturnaround.com/rebellabs/developer-productivity-report-2015-java-performance-survey-results/
55%
51%
38%
28%
28%
Slow database queries
Inefficient application code
Too many database queries
Concurrency issues
Memory leaks
Issues that
don’t require
load to
reproduce

6. When do you find performance
issues in your application?
Reactive Approaches

7. XRebel for every developer
• Not a post-development profiler or a production monitoring
solution – Be proactive
• Author of code gets feedback – Act faster
• Fix issues when they are the easiest to debug - Reduce technical debt

8. XRebel for every developer
“XRebel made it feasible to track down performance
bottlenecks in day-to-day work - even for programmers
without special skills / training in that area of experience”
–DEVELOPMENT TEAM LEAD, PROCESS MANAGEMENT COMPANY

9. Benefits of XRebel
Built for everybody
Useful for experts and junior developers alike.
Contextual
Retrieve relevant information for the current page to easily find
and fix common performance issues.
Rapid feedback
Make performance tweaks continuously for better code quality.
Be truly agile.
Transactional
Follow transactions starting from the web request through
different threads, applications and JVMs.

10. XRebel
Toolbar
XRebel toolbar is
an HTML widget

11. Application profiling
Track the time spent on each request. Find slow
methods and make them run faster.
Database and NoSQL
Get insight into database activity. Spot methods
that query too much.
Messages and jobs
Monitor messages and background jobs.
Fix resource hogs.
Web services and RMI
Get a detailed overview of invocations executed.
Detect slow calls.
Exceptions
Discover hidden exceptions. Follow the stack
trace and fix the problems.
Key features

12. Key features

13. Application Profiling

14. Application
profiling

15. Insight into Database
Queries

16. Database calls,
external services

17. Database calls,
external services

18. Microservices and
Distributed applications

19. Distributed
applications

20. Find Rogue Exceptions

21. Exceptions

22. Getting started with XRebel
1. http://xrebel.com/download
2. http://manuals.zeroturnaround.com/xrebel/
3. -javaagent:/path/to/xrebel.jar

23. Why XRebel?
Be proactive about performance!
• Think about performance as you write code
• Get immediate feedback
• Find common issues before they
become a real problem

24. Pet Clinic
Jean Cla
Maria El
Jeff John
David
Cho
Watch XRebel in action
at www.xrebel.com
Try XRebel free for 14 days!