My understanding of point #2 is that LLVM may still try to devirtualize the call, which would reduce the performance impact -- is that true for Rust? I know it

My understanding of point #2 is that LLVM may still try to devirtualize the call, which would reduce the performance impact -- is that true for Rust? I know it happens sometimes in C++. Also for proc macros, rust-analyzer seems to struggle with them sometimes as well, so I try to avoid them (outside Serde, which is worth any price) for that reason.