[BUG] huge memory leak

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

Claude Code in ghostty is using 17.7 GB RAM. Seems like a huge memory leak, especially compared to alternatives like Codex, which uses maybe 50-200 MB.

Additionally, claude code get's extremly laggy, just after a few messages. Maybe due to wrong approach to repeated text rendering in the terminal?

<img width="1249" height="293" alt="Image" src="https://github.com/user-attachments/assets/2ce49860-9b34-41bd-b9a0-742c1ced06b1" />

What Should Happen?

Should not devour memory.

Error Messages/Logs

N/A

Steps to Reproduce

1. Start CC session
2. Try running it for a while, compact. Memory randomly spikes

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.39

Platform

Anthropic API

Operating System

Other Linux

Terminal/Shell

Other

Additional Information

<img width="1249" height="293" alt="Image" src="https://github.com/user-attachments/assets/84e770af-41ef-41a6-8234-6e7b639734b5" />