WSL2: Access container build result from host: `docker cp` vs. bind mount

Question

I am using Docker with WSL2 to build a project and would like to access the build results of the container from the host.

It appears there are two ways for accessing the build results:

• Use docker cp
• Use bind mount

With WSL2 there is a performance decrease when bind mounting the Windows file system (opposed to the WSL2 \\wsl$ Linux file system), see Docker Desktop - Filesharing notification about poor performance and WSL Documentation. However, I would like to avoid using \\wsl$ since I would then have to make sure to pick a unique path there for storing the build results, copying them to the current directory and then properly cleaning the \\wsl$ dir up again (unless I am misunderstand something here?).

This leaves me with the following two options:

• Use docker cp
  This requires three Docker commands:
  1. Build the artifact
     docker container run ...
  2. Copy the artifact to the host
     docker cp ...
  3. Remove container
     docker container rm ...
• Use bind mount
  1. Build the artifact in a non-mounted directory (for performance, see above)
  2. Copy the artifact to the mounted directory

My question is now: Which of these options is more efficient? Or are there any other efficient and simple alternatives?

I would assume docker cp ... could be more efficient since it might be able to access the container data without the performance penalty a bind mount would have; however the three separate Docker commands deter me a bit since if any of these fails (for whatever reason) I manually have to copy the artifact or clean up the container.