Git Rebase vs Merge: When to Use Each

The Core Difference

Both git merge and git rebase integrate changes from one branch into another — but they do it differently.

Merge

Merge creates a special commit (merge commit) that has two parents:

git checkout main
git merge feature-login

History: Non-linear, preserves exactly what happened and when.

Pros: Accurate timeline, safe for shared branches, easy to undo.

Cons: Cluttered history with merge bubbles.

Rebase

Rebase rewrites commits from your branch on top of another:

git checkout feature-login
git rebase main

History: Linear, clean — looks like work was done sequentially.

Pros: Clean git log, easier bisecting, no merge bubbles.

Cons: Rewrites history, dangerous on shared branches.

When to Merge

• Merging a long-lived feature branch into main
• Working on a shared branch with other developers
• When preserving exact chronology matters
• In public repositories where history is sacred

When to Rebase

• Updating your feature branch with latest main changes
• Cleaning up commit history before a pull request
• Personal branches that no one else has pulled
• When you want a linear, readable git log

The Hybrid Approach

Many teams use this workflow:

1. Rebase feature branches onto main daily to stay current
2. Squash commits into logical units
3. Merge (with --no-ff) into main to mark the feature

This keeps history clean while preserving collaboration context.