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Leopard Reference Library: Darwin
The performance of Darwin applications 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.
View all Performance Reference Library.
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Getting Started with launchd (HTML)
Learn about launchd and see how to migrate your configuration files.
 Articles 2005-08-22
Tiger Developer Overview Series: Developing 64-bit Applications (HTML)
Learn how Mac OS X Tiger breaks the limitations of 32-bit computing.
 Articles 2004-12-20
64-Bit Transition Guide (HTML) (PDF)
Describes the 64-bit features available in Mac OS X.
 Guides 2008-04-08
File System Events Programming Guide (HTML) (PDF)
Explains how applications can detect changes in the file system.
 Guides 2008-03-11
Performance Overview (HTML) (PDF)
Introduces the factors that determine performance.
 Guides 2006-10-03
Affinity API Release Notes for Mac OS X v10.5 (HTML)
Explains how to influence which CPU core runs a group of threads (for performance optimization).
 Release Notes 2007-10-31
dist_fft (HTML) (DMG) (ZIP)
Gigaelement FFTs on Apple G5 clusters
 Sample Code 2004-08-23
GDB for MacsBug Veterans (HTML)
TN2030: Translate your experience with MacsBug into a working knowledge of the GNU source-level debugger (GDB).
 Technical Notes 2001-10-18
Disabling Processor Cores on a Multi-Core System (HTML) (日本語 HTML)
QA1141: Describes how to disable processor cores on a multi-core system for testing purposes.
 Technical Q&As 2008-09-16
Signals and Threads (HTML) (日本語 HTML)
QA1184: Describes how threads and signals interact.
 Technical Q&As 2002-08-27