Is there a difference in writing macros using types or string interpolation?

[looneytsci (Dmitriy)]

Hello! I'm wondering if there any difference between creating macro using types or just string interpolation? Can one way be faster? And what is preferred way to create macro expansion?

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[ahoppen (Alex Hoppen)]

There generally isn’t. The string literal will get parsed into a syntax tree.

[David_Catmull]

If there's a performance difference, I expect it doesn't really matter unless you use the macro a very large number of times.