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[PERF] /undo /redo really slow on larger repos and/or long histories #11486
Description
Description
For large repositories or for repositories with long git histories, where .git is large, /undo and /redo performance is really slow
Not entirely sure how the progress is stored in the .git index and why would it exponentially slow down with the size of the .git history, especially when changes are NOT committed during the session
The file changes are also not large and do not seem to relate with any in session work. A fresh session with a simple message "hi" will take 10-15s to undo. Redo seems to take 2-3x longer than what undo took
Plugins
None
OpenCode version
1.1.48
Steps to reproduce
- Open Large Repo / Long Git History
- undo a message - slow
- redo a message - slower
Screenshot and/or share link
No response
Operating System
macos 15.7.3
Terminal
Ghossty
Activity
github-actions commentedon Jan 31, 2026
Thanks for the detailed report! I've searched through existing issues and found a potentially related issue that could contribute to this problem:
Additionally, there may be an underlying issue with how snapshots/git operations are handled on large repositories that could contribute to the exponential slowdown you're experiencing.
This appears to be primarily a performance issue specific to the /undo /redo commands on large repos, rather than a duplicate of existing reports. Your detailed steps to reproduce and the specific timing (10-15s for undo, 2-3x slower for redo) will be helpful in diagnosing this.
github-actions commentedon Apr 2, 2026
To stay organized issues are automatically closed after 90 days of no activity. If the issue is still relevant please open a new one.