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> Increasing parallelism may speed up compile times, but may also produce slower code

Why do I have to make the choice between faster compiles and faster binaries?

The exact same thing happens in C++—when you're not using LTO, you can pass multiple source files to the compiler at a time to allow these files to be optimized together, but keeping them separated at a file-level prevents optimizations such as inlining functions between them.

Compiling with and without optimizations is another example of that choice.

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