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Codex Issues / #40462

Computer Use repeatedly triggers sustained CUA process load and causes severe Mac overheating

Open 💬 2 comments Opened Aug 24, 2026 by hybtc8888
💡 Likely answer: A maintainer (github-actions[bot], contributor) responded on this thread — see the highlighted reply below.

What version of the Codex App are you using (From “About Codex” dialog)?

26.810.52044

What subscription do you have?

PRO 5X

What platform is your computer?

macOS 26.5.2（25F84）

What issue are you seeing?

标题：Computer Use 可重复触发 CUA 进程持续高负载并导致 Mac 严重过热

设备环境：

  • MacBook Air（Mac17,3）
  • Apple M5，10 核 CPU
  • 16 GB 内存
  • macOS 26.5.2（25F84）
  • Codex 26.810.52044

问题描述：
实际使用 Computer Use 后，可重复出现 Mac 剧烈发热。异常进程为 ChatGPT/Codex 内置的 cua_node/.../kernel.js，两次观察到其持续占用约 152%–260% CPU、约 2 GB 内存，峰值约 4.9 GB，并可残留运行数小时（分别约 3 小时和 19 小时）。

进程采样显示它在反复进行文件读取、字符串转换及 V8 垃圾回收，并持续读取一个约 830 MB 的 Codex rollout 会话日志。SkyComputerUseService 本身几乎不占 CPU，主要问题集中在 CUA Node 内核。

禁用 Computer Use 开关不会终止已经运行的异常 CUA 进程，必须手动结束 kernel.js 及其 node_repl 父进程后，CPU 和内存才立即恢复正常。重启后仅打开开关不会异常，但实际调用 Computer Use 后会再次复现。

期望行为：

  1. Computer Use 操作结束、取消或超时后，CUA 内核应及时退出并释放资源。
  2. 禁用 Computer Use 时应终止已有会话和后台进程。
  3. 不应无界、反复全量读取大型 rollout 日志。
  4. 建议增加空闲超时、CPU/内存 watchdog、增量日志读取和明确的 Force Stop 按钮。

该问题具有明确的可重复性，并会导致设备持续过热、性能下降和额外耗电。

What steps can reproduce the bug?

Feedback ID: 01a03424-6a2e-7e51-a41c-ddd1e3562aaa

What is the expected behavior?

_No response_

Additional information

_No response_

View original on GitHub ↗

2 Comments

github-actions[bot] contributor · 3 days ago

English translation:

What version of the Codex App are you using (From “About Codex” dialog)?

26.810.52044

What subscription do you have?

PRO 5X

What platform is your computer?

macOS 26.5.2 (25F84)

What issue are you seeing?

Title: Computer Use repeatedly triggers sustained CUA process load and causes severe Mac overheating

Device environment:

  • MacBook Air (Mac17,3)
  • Apple M5, 10-core CPU
  • 16 GB memory
  • macOS 26.5.2 (25F84)
  • Codex 26.810.52044

Issue description:
After using Computer Use, the Mac repeatedly becomes extremely hot. The problematic process is ChatGPT/Codex's built-in cua_node/.../kernel.js. On two occasions, it was observed continuously using approximately 152%–260% CPU and around 2 GB of memory, peaking at approximately 4.9 GB, and it continued running for hours (approximately 3 hours and 19 hours, respectively).

Process sampling shows that it repeatedly performs file reads, string conversions, and V8 garbage collection while continuously reading an approximately 830 MB Codex rollout session log. SkyComputerUseService itself uses almost no CPU; the main issue is concentrated in the CUA Node kernel.

Disabling the Computer Use toggle does not terminate an already running problematic CUA process. CPU and memory usage return to normal immediately only after manually terminating kernel.js and its parent node_repl process. After restarting, merely enabling the toggle does not cause the issue, but it occurs again after Computer Use is actually invoked.

Expected behavior:

  1. After a Computer Use operation finishes, is canceled, or times out, the CUA kernel should exit promptly and release resources.
  2. Disabling Computer Use should terminate existing sessions and background processes.
  3. It should not repeatedly read an entire large rollout log without bounds.
  4. Consider adding an idle timeout, a CPU/memory watchdog, incremental log reading, and an explicit Force Stop button.

This issue is clearly reproducible and causes sustained device overheating, degraded performance, and additional power consumption.

What steps can reproduce the bug?

Feedback ID: 01a03424-6a2e-7e51-a41c-ddd1e3562aaa

What is the expected behavior?

_No response_

Additional information

_No response_

<!-- codex-issue-translator -->

github-actions[bot] contributor · 3 days ago

Potential duplicates detected. Please review them and close your issue if it is a duplicate.

  • #39151

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