How does Git's 'fast-forward' merge differ from a 'three-way' merge?

  • Fast-forward merge applies when the branch being merged has no new commits since the base, while a three-way merge handles cases where both branches have new commits.
  • Fast-forward merge is a Git command used to combine branches with a linear history, while a three-way merge is used for non-linear histories, creating a new commit that ties the histories together.
  • Fast-forward merge is a synonym for three-way merge in Git, both terms refer to the same process.
  • Fast-forward merge only considers changes in the working directory, whereas a three-way merge considers changes in both branches and the common ancestor.
In Git, a fast-forward merge occurs when the branch being merged has no new commits since the base, while a three-way merge is used for branches with divergent commits.
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