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Mastering Grand Central Dispatch

Synchronous and Asynchronous Execution

Up until now we submitted blocks of work to a dispatch queue by invoking the async(execute:) method. In this episode, we explore how Grand Central Dispatch handles the execution of a block of work. Work can be executed synchronously or asynchronously. What does that mean? What is the difference? And what are the risks?

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Next Episode "Adding Flexibility With Dispatch Work Items"