'mvn clean Compile package' runs Phase Compiler 2 times?

Question

Once if I run mvn clean package i know that consequently will run all phases of the default Lifecycle from Maven prior to package (Compile, test, package), so it is:

calling for mvn clean Compile package Phase Compile will be executed 2x?

Obs: The reason for the question is because I saw this in a code and although it is unnecessary, raised the doubt about the performance.

Answer 1

Yes, the command mvn clean compile package will run the Phase Compile twice.

This can be easily checked in the Maven log, as example below, in the excerpt maven-compiler-plugin:3.3:compile that sometimes appears:

[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building MyProject 0.0.1-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ MyProject ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 1 resource
[INFO]
[INFO] --- maven-compiler-plugin:3.3:compile (default-compile) @ MyProject ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 264 source files to C:\projetos\MyProject\target\classes
[INFO]
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ MyProject ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 1 resource
[INFO]
[INFO] --- maven-compiler-plugin:3.3:compile (default-compile) @ MyProject ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 264 source files to C:\projetos\MyProject\target\classes