MATLAB Programming

Testing the Validity of a Timer Object ................. 10-23
Deleting All Existing Timer Objects .................. 10-23
Finding All Timer Objects in Memory ................ 10-24
Finding Invisible Timer Objects ...................... 10-24
11
Improving Performance and Memory Usage
Analyzing Your Program’s Performance ............. 11-2
The M-File Profiler Utility .......................... 11-2
Stopwatch Timer Functions ......................... 11-2
Techniques for Improving Performance ............. 11-4
MultithreadedComputationinMATLAB .............. 11-4
Vectorizing Loops ................................. 11-4
Preallocating Arrays ............................... 11-7
Coding Loops inaMEX-File ......................... 11-9
Assigning to Variables ............................. 11-9
Operating on Real Data ............................ 11-10
Using Appropriate Logical Operators ................. 11-10
Overloading Built-In Functions ...................... 11-11
Functions Are Generally Faster Than Scripts ........... 11-11
Load and Save Are Faster Than File I/O Functions ...... 11-11
Avoid Large Background Processes ................... 11-11
Using Memory Efficiently .......................... 11-12
Memory Allocation for Arrays ....................... 11-12
Data Structures and Memory ........................ 11-16
Memory Management Functions ..................... 11-17
Strategies for Efficient Use of Memory ................ 11-18
Resolving “Out of Memory” Errors .................. 11-21
General Suggestions for Reclaiming Memory ........... 11-21
Compressing Data in Memory ....................... 11-22
Increasing System Swap Space ...................... 11-22
Freeing Up System Resources on Windows Systems ..... 11-23
Reloading Variables on UNIX Systems ................ 11-23
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