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[Performance] Critical CPU usage and memory leak even when starting a new session #12513

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herjarsa/opencode
#2
Closed
[Performance] Critical CPU usage and memory leak even when starting a new session#12513
herjarsa/opencode
#2
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rekram1-node
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bugSomething isn't workingperfIndicates a performance issue or need for optimization

Description

@roymecat
roymecat
opened on Feb 6, 2026

Description

The application becomes extremely sluggish immediately after startup. Even with a fresh session and no large files open, the system becomes nearly unresponsive.

Diagnostic Observations
Monitoring via top reveals critical resource consumption:

CPU Usage: Consistently hitting nearly 200%.
Virtual Memory: The process is requesting approximately 92.5GB, which is abnormal for a fresh session.
Steps to Reproduce:

Plugins

oh-my-opencode

OpenCode version

1.1.53

Steps to reproduce

Launch Opencode
Create or open a new session (with no large projects/files).
Wait for 30–60 seconds.
Check system resources via top or htop

Expected Behavior

The application should idle at a reasonable CPU and memory footprint when no heavy tasks are being performed

Screenshot and/or share link

Image Image

Operating System

Debian 13.3

CPU

Intel(R) Xeon(R) CPU E5-2699 v4 @ 2.20GHz

Terminal

Termius

Activity

  1. roymecat
    added
    bugSomething isn't working
    on Feb 6, 2026
  2. github-actions
    assigned
    rekram1-node
    on Feb 6, 2026
  3. github-actions
    added
    perfIndicates a performance issue or need for optimization
    on Feb 6, 2026

  4. github-actions commented on Feb 6, 2026

    @github-actions
    github-actionsBot
    on Feb 6, 2026 – with GitHub Actions
    Contributor

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

    Feel free to ignore if none of these address your specific case.

  5. roymecat commented on Feb 6, 2026

    @roymecat
    roymecat
    on Feb 6, 2026
    Author

    I’ve done some further investigation into the 100% CPU usage. It appears that Opencode is pinning a single CPU core to 100% while other cores remain idle or underutilized.

  6. cloudpresser commented on Feb 14, 2026

    @cloudpresser
    cloudpresser
    on Feb 14, 2026

    I'm experiencing this too, and also very high memory usage (3.5gb on startup, and climbs). I don't have Oh-My-Opencode, but do have osgrep and some other plugins/mcps. Is there a way to inspect this to pinpoint?

    ram cpu

  7. felipecarvalho commented on Feb 14, 2026

    @felipecarvalho
    felipecarvalho
    on Feb 14, 2026

    I'm experiencing this too, and also very high memory usage (3.5gb on startup, and climbs). I don't have Oh-My-Opencode, but do have osgrep and some other plugins/mcps. Is there a way to inspect this to pinpoint?

    ram cpu

    Same problem here with MacBook Air M1 on MacOS 26.2

  8. thdxr commented on Apr 2, 2026

    @thdxr
    thdxr
    on Apr 2, 2026
    Member

    Closing in favor of #20695 where we're collecting all memory-related problems. Please follow that issue for updates.

  9. thdxr
    closed this as completedon Apr 2, 2026
  10. herjarsa
    added a commit that references this issue on Apr 25, 2026

    Merge pull request #2 from herjarsa/fix/sqlite-wal-crash-on-open-24287

    63f58d2
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