如何在 Xcode 中为每个文件设置优化级别？

Question

I'm writing some performance critical Swift code that I'm sure is safe to be optimized with -Ounchecked . I'd like the rest of the code to be compiled with a less aggressive optimization.

I can set compiler settings per file as per the answer here: Specific compiler flags for specific files in Xcode

How can I use that knowledge to set a specific file in my project to one of Swift's various optimization levels? (ie what compiler settings are available to me and how can I use them)

Answer 1

I am not sure whether this is an answer to your question or just a side note but you can disable/enable optimization on specific function, not just per file, using optimize() compiler directive

void* __attribute__((optimize("O0"))) myfuncn(void* pointer) {
    // unmodifiable compiler code
}

This will ensure your myfuncn() function will not be optimized