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A comment on How generics are implemented in Go 1.18. Parent comment

Re:How generics are implemented in Go 1.18 by nicoburns on Tuesday March 01, 2022 @05:34PM (#30520975)
> Although monomorphization takes a significant chunk of a typical Rust compilation, it pales in comparison to LLVM codegen

It's not the monomorphization itself that takes a long time, it's the LLVM codegen due to all the extra code being generated from duplicated function implementations. I've heard macros slow for largely the same reason, it's not the macro execution itself that's slow, it's compiling all the generated code.

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Re:How generics are implemented in Go 1.18 by yakubin on Wednesday March 02, 2022 @05:47AM (#30525921)
> I've heard macros slow for largely the same reason, it's not the macro execution itself that's slow, it's compiling all the generated code.

If that were true, the same issue would apply to hygienic macros, yet it doesn't. It's distinctly a problem with proc macros.

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