PDF Presentation - Uplinq

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Database Applications Optimizations • Database Update — dbc_IStatement – Disable Journaling when data integrity is not required (SQLite Pragma) – Minimize db operations (query/update): • Use transactions static const char* cpszPragma = "PRAGMA journal_mode = PERSIST;" // static const char* cpszPragma = "PRAGMA journal_mode = OFF;" nErr = DBCConnection_New(pszPath, me->piEnv, po, eFlags, ppic); cpszUpdate = cpszPragma; ERR_BAIL(dbc_IConnection_CreateStatement(*ppic, cpszUpdate, &nTail, &pis)); ERR_BAIL(dbc_IStatement_ExecuteUpdate(pis)) – Use Cache (control cache size via SQLite Pragmas) • Database Queries – Refer to Database Technology Guide — https://brewmobileplatform.qualcomm.com/devnet/index.jsp#databases 34
Memory Management Considerations • Avoid fragmenting heap – See next page for explanation of heap fragmentation • Consider using block allocator – for (i=0; i
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 and 18: Leverage the Functionality Provided
Page 19 and 20: Brew MP API Usage Considerations: S
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: Storage Optimization: Use a Smaller
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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