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Brew MP API Usage Considerations • New Brew MP APIs are generally improved over Brew 3.1.5 legacy interfaces – BrewMP ISockPort replaces Brew3.1.5’s 315’ ISocket interface • Reference: https://brewmobileplatform.qualcomm.com/devnet/docviewer.jspm ethod=show&id=5790&path=%2FdevEx%2Flibrary%2Ftechguides %2Fc%2Fnetworking%2Fnetworking_tech_guide%2Fhtml_out_oe m%2Fframeset.html – IFileSystem2 – Minimize calls to GETTIMESECONDS and GETUPTIME • Frequently called by app more often the necessary • These calls have have a relatively high performance cost – GETTIMESECONDS has the higher overhead of the two 18
Brew MP API Usage Considerations: Scheduling Work • Always use ISHELL_Resume to break an IApplet’s time-consuming tasks into smaller, interruptible chunks use – A common performance mistake is to use ISHELL_PostEvent() for this purpose, p which works functionally – ISHELL_PostEvent() is more costly than ISHELL_Resume • ISHELL_PostEvent() destination applet class ID as argument • Iterates through the applet database to match the class ID 19
Page 1 and 2: Brew MP Performance Tips Rich Stew
Page 3 and 4: Agenda • Performance Concepts •
Page 5 and 6: General Performance • What is opt
Page 7 and 8: Throughput vs. Latency (cont.) •
Page 9 and 10: Trading Off CPU vs. Memory Utilizat
Page 11 and 12: Event Handling • A backlog in the
Page 13 and 14: Strings (cont.) • Don't call strl
Page 15 and 16: 15 BMP Architectural Overview
Page 17: Leverage the Functionality Provided
Page 21 and 22: JPEG Decoding Optimization • 5Mp
Page 23 and 24: Resource Usage: Use Bitmap Fonts or
Page 25 and 26: Resource Usage: Avoid Blending in R
Page 27 and 28: Resource Usage: Preloading and Reus
Page 29 and 30: Resource Usage: Use PNG Crush • E
Page 31 and 32: 31 Memory Utilization Consideration
Page 33 and 34: Storage Optimization: Use a Smaller
Page 35 and 36: Memory Management Considerations
Page 37 and 38: Apply Brew MP Best Practices to Avo
Page 39 and 40: 39 Power Utilization Considerations
Page 41 and 42: Power Management—Minimize Number
Page 43 and 44: Principles of Code Optimizations Us
Page 45 and 46: CS Heap Tracker (CHT) • CHT is a
Page 47 and 48: Summary • Performance is comprise
Page 49 and 50: Resource Usage: Miscellaneous • I

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