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mikeash.com: Friday Q&A 2014-06-06: Secrets of dispatch_once

Reader Paul Kim pointed out an entry on Michael Tsai's blog about making dispatch_once fast. While the comment in the dispatch_once source code is fascinating and informative, it doesn't quite delve into the detail that some would like to see. Since this is one of my favorite hacks, for today's artiā€¦

Click to view the original at mikeash.com