memory is such a fundamental resource, OS X and iOS both provide several ways to allocate it. Which allocation techniques you use will depend mostly on your needs, but in the end all memory allocations eventually use the malloc library to create the memory. Even Cocoa objects are allocated using the malloc library eventually.
The use of this single library makes it possible for the performance tools to report on all of the memory allocations in your application.
If you are writing a Cocoa application, you might allocate memory only in the form of objects using the alloc method of NSObject. Even so, there may be times when you need to go beyond the basic object-related memory blocks and use other memory allocation techniques. For example, you might allocate memory directly using malloc in order to pass it to a low-level function call.
The following sections provide information about the malloc library and virtual memory system and how they perform allocations. The purpose of these sections is to help you identify the costs associated with each type of specialized allocation. You should use this information to optimize memory allocations in your code.
The use of this single library makes it possible for the performance tools to report on all of the memory allocations in your application.
If you are writing a Cocoa application, you might allocate memory only in the form of objects using the alloc method of NSObject. Even so, there may be times when you need to go beyond the basic object-related memory blocks and use other memory allocation techniques. For example, you might allocate memory directly using malloc in order to pass it to a low-level function call.
The following sections provide information about the malloc library and virtual memory system and how they perform allocations. The purpose of these sections is to help you identify the costs associated with each type of specialized allocation. You should use this information to optimize memory allocations in your code.
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