When comparing gitk vs Sublime Merge, the Slant community recommends gitk for most people. In the question“What are the best Git clients for macOS?” gitk is ranked 14th while Sublime Merge is ranked 20th. The most important reason people chose gitk is:
When using gitk to scan a long list of changes, the user is able to see more of the list without pagination, as there is no huge buffer of whitespace between each entry.
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Pros
Pro Visibly more compact overview output than many other options
When using gitk to scan a long list of changes, the user is able to see more of the list without pagination, as there is no huge buffer of whitespace between each entry.
Pro Fast
Since it's pretty minimalistic and does not contain a lot of features (for example, it can't commit), it's quite fast.
Pro Free
Gitk is a free and open source tool. It forms part of the official git suite.
Pro Comes with Git
Gitk is a part of the git package, so no additional application is necessary: it is developed right alongside git itself.
Pro Easy to use
Pro Fast
This is one the fastest client we've found for switching around them.
Pro Actual git commands are visible/editable
Most actions have an option where it will show the actual Git command it's going to run, and you can modify it in place. Very handy if you need to use some obscure option, and also good training for learning command-line operations.
Pro Easy for beginners
This helps to see more complexity and it's very easy to get started with.
Cons
Con Cannot commit
The user needs to use a different Git client (GUI or otherwise) to commit changes.
Con Does not automatically update
The user must press F5 to refresh the view as there is no automatic update available.
Con Slim feature set
Con Dark theme behind paywall
The evaluation version is fully functional, but is restricted to the light theme only.