Advanced Swift
Q91 / 100

What is the Swift compiler's whole-module optimization (WMO)?

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The correct answer is B) A compilation mode analyzing all module files together, enabling cross-file inlining, devirtualization, and dead code elimination

B

Correct Answer

A compilation mode analyzing all module files together, enabling cross-file inlining, devirtualization, and dead code elimination

Explanation

WMO (-whole-module-optimization) compiles all Swift files as one unit. The compiler can inline across file boundaries and remove unused generics, improving performance significantly.

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