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The copy-on-write (a.k.a. CoW or 🐮) optimisation is the quintessential under-the-hood interview question for iOS engineers.
Today, we’re going on a quest to discover how this optimisation really works. I’m taking you on a journey deep into the enigmatic source code of the Swift compiler.
And, of course, I’m going to be referring to copy-on-write as 🐮 throughout.
