Description of the problem / feature request:

When performing a remote build, the --remote_download_minimal flag is very useful for making things seem fast, but not so helpful if the local bazel daemon is restarted for some reason. It would be ideal if bazel build (and test) could download build outputs asynchronously. This would allow cases where local execution is desirable (eg. debugging, or when refreshing the build graph) to also execute quickly

Feature requests: what underlying problem are you trying to solve with this feature?

To make local builds and tests benefit from an RBE without needing to constantly download everything before indicating that a build is complete.

Have you found anything relevant by searching the web?

No.