Generally, the following rule of thumb can be used: Use rebase if you have a local branch with no other branches that have branched off from it, and use merge for all other cases.

Hydra is an open-source Python framework that simplifies the development of research and other complex applications. The key feature is the ability to dynamically create a hierarchical configuration by composition and override it through config files and the command line. The name Hydra comes from its ability to run multiple similar jobs - much like a Hydra with multiple heads.