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Leopard Reference Library
The performance of Mac OS X applications and hardware devices can be measured, evaluated, and optimized using Apple's developer tools, technologies, and programming interfaces. Developers can fine-tune their applications for high performance using tools such as the Shark code-profiling application, features such as multiprocessing, and APIs such as the one for the vDSP library.
A guided introduction to improving performance in Mac OS X software.   Essential information for improving the performance of developer applications.   API references, organized by framework.
Performance Topics
Audio
Facilities for improving performance when working with sound. 		 
Carbon
Facilities for measuring, evaluating, and improving Carbon code performance. 		 
Cocoa
Facilities for measuring, evaluating, and improving Cocoa code performance.
Core Foundation
Support for improving Core Foundation code performance. 		 
Darwin
Facilities for measuring, evaluating, and improving Darwin code performance. 		 
Graphics & Imaging
Resources for measuring, evaluating, and improving graphics performance.
Hardware & Drivers
Resources for evaluating and improving device and software performance. 		 
High Performance Computing
Support for improving the performance of cluster and grid computing. 		 
Intel-Based Macs
Developer support for optimizing products for Intel-based Macs.
Java
Facilities for measuring, evaluating, and improving Java code performance. 		 
Multiprocessing
APIs for managing multiple threads and subtasks in applications. 		 
Storage
Facilities for measuring, evaluating, and improving storage device performance.
Tools
Resources for measuring, evaluating, and improving code performance. 		 
Vector Engines
Acceleration of computationally intensive calculations on Intel and PowerPC processors. 		 
View legacy documents, including technologies, features, products, APIs, and programming techniques that are no longer supported or have been superseded.