How to clean up substrate runtime compiled result and compile again

Question

Now, The only way I used is cargo clean and then cargo build again.

Answer 1

There's two way to have a clean compile:

1. Remove directory target with following command if you using Mac or Linux

   rm -rf target

2. Cargo clean and build with following command:

   cargo clean && cargo build --release

Answer 2

You can also delete the target directory that contains all the build artifacts.