Performance Issue in 1.3.0 #18946

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1. yynag

   added

   bugSomething isn't workingSomething isn't working

   on Mar 24, 2026
2. github-actions

   assigned

   kommander

   on Mar 24, 2026
3. github-actions

   added

   opentuiThis relates to changes in v1.0, now that opencode uses opentuiThis relates to changes in v1.0, now that opencode uses opentui

   perfIndicates a performance issue or need for optimizationIndicates a performance issue or need for optimization

   on Mar 24, 2026
4. github-actions commented on Mar 24, 2026

   

   github-actionsBot

   on Mar 24, 2026 – with GitHub Actions

   Contributor

   More actions

   This issue might be a duplicate of existing issues. Please check:

   • Interface instability and slow performance with complex sessions #12078: Interface instability and slow performance with complex sessions (same opentui/perf labels, similar TUI slowness symptoms)
   • Long prompt history stalls the app, long load time #3746: Long prompt history stalls the app, long load time (similar TUI lag with large content)
   • High CPU usage (100%+) during LLM streaming in long sessions due to O(n) text buffer rendering #6172: High CPU usage due to O(n) text buffer rendering in long sessions (TUI rendering performance)
   • Add configurable scrollback/message limit to reduce TUI lag #9930: Add configurable scrollback/message limit to reduce TUI lag (related mitigation request)

   If your issue is different from these, feel free to add more details about what distinguishes it (e.g., specific trigger, reproduction steps).
5. thdxr

   removed

   bugSomething isn't workingSomething isn't working

   opentuiThis relates to changes in v1.0, now that opencode uses opentuiThis relates to changes in v1.0, now that opencode uses opentui

   perfIndicates a performance issue or need for optimizationIndicates a performance issue or need for optimization

   on May 3, 2026
6. github-actions commented on Jul 3, 2026

   

   github-actionsBot

   on Jul 3, 2026 – with GitHub Actions

   Contributor

   More actions

   To stay organized issues are automatically closed after 60 days of no activity. If the issue is still relevant please open a new one.
7. github-actions

   closed this as not plannedon Jul 3, 2026