message: docs: add note on target-cpu=native when manually installing
diff: @@ -282,6 +282,10 @@ cargo install --path .
  # Option 3 - Clone and install directly from the repo all via Cargo
  cargo install --git https://github.com/ClementTsang/bottom
  +
  +# You can also want to pass in the target-cpu=native flag for
  +# better CPU-specific optimizations. For example:
  +RUSTFLAGS="-C target-cpu=native" cargo install --path .
  ```
  ### Binaries
  