In this iteration of iOS Meetup, The experts from Seven Peaks Software will walk you through on the Swift programming language, Giving you the latest tips and tricks for you to be success on the iOS development Ruttanachai walked you through on How to get better performance out of your app. Understand tools, metrics, and paradigms that can help smooth your development process and contribute to a great experience for people using your app. As the performance of any app is crucial for user engagement and retention. When an app grows, more features get added, app size increases, and external dependencies increase. It is essential to measure the impact of these changes and continuously improve the app for better performance.

1. How to Get Better Performance Out of Your App
Ruttanachai Auitragool
30.03.22

2. Speaker
Ruttanachai Auitragool
Senior iOS developer at Seven Peaks Software
8 years of experience

3. ● Overview
○ An Approach to Application Performance Optimization.
○ Performance optimization, improve your app performance using MetricKit
○ See how the Xcode Organizer displays the most important metrics from your app.
● Diagnose & Eliminate Hangs
○ Track down hangs and delays in your app
○ Show tools and methods to discover hangs and their causes
○ Explore best practices for eliminating hangs
● Performance Improvement with MetricKit framework
○ Live Demo
Agenda

4. Overview

5. ● Fast and Reliable
● Complexity
● Huge amounts of data
● External systems
● User engagement
● Retention
● Use your app more often
● Use your app for a longer period of time
An Approach to Application Performance Optimization.

6. Improve your app performance using MetricKit

7. ● CPU
● Networking
● Location Service
Battery Usage

8. Launch Time

9. Hang Rate

10. Memory

11. Disk Write

12. Scrolling

13. Terminations

14. ● Process these metrics at your server
● Measure custom intervals in the app
● Import MetricKit
● Subscribe to MXMetricManager
● Implement MXMetricManagerSubscriber method to receive consolidated data
MXSignpost

15. Diagnose & Eliminate Hangs

16. What is a hang?
Bad Good

17. What cause hangs?
● Proactively doing work & Performing irrelevant work (On the main thread)

18. What cause hangs?
Suboptimal API Optimal API

19. What cause hangs?
● Synchronous API (On the main thread)

20. What cause hangs?
● File I/O

21. How to diagnose hang?
MetricKit
Time Profiler Instrument

22. ● Reduce the amount of work done on the main thread.
○ Optimize the work already being done on the main thread.
■ Caches
■ Notification Observers
○ Move work off the main thread.
■ Asynchronous API (GCD)
How to eliminate hangs

23. Notification Observers

24. Asynchronous API

25. MetricKit Framework Demo

26. MetricKit Framework Demo

27. Conclusion

28. UPCOMING MEETUP
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Stay tuned for whatʼs coming next!