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Now that multicore processors are coming to mobile devices, wouldn`t it be great to take advantage of all those cores without having to manage threads? This concise book shows you how to use Apple`s Grand Central Dispatch (GCD) to simplify programming on multicore iOS devices and Mac OS X.

Managing your application...s resources on more than one core isn`t easy, but it`s vital. Apps that use only one core in a multicore environment will slow to a crawl. If you know how to program with Cocoa or Cocoa Touch, this guide will get you started with GCD right away, with many examples to help you write high-performing multithreaded apps.

• Package your code as block objects and invoke them with GCD
• Understand dispatch queues-the pools of threads managed by GCD
• Use different methods for executing UI and non-UI tasks
• Create a group of tasks that GCD can run all at once
• Instruct GCD to execute tasks only once or after a delay
• Discover how to construct your own dispatch queues