Expensive calls to "outlined init with take"

[mattcurtis]

Really glad you found and shared this solution! I wrote a generic version of it:

Swift tanking performance by excessively copying enums when pattern matching?

I wrote a property wrapper that works around this issue and the compiler is able to optimize into a faster set of instructions, based on a solution discovered by @Karl, assuming (like me) you're stuck working with the current version of Swift that has this issue and not the nightly, which seems to have largely fixed it. @propertyWrapper struct ExpensiveValue<Value> { var wrappedValue: Value var projectedValue: Value { optimizableFastGet() } func optimizableFastGet() ->…