### Preflight Checklist - [x] I have searched [existing issues](https://github.com/anthropics/claude-code/issues?q=is%3Aissue%20state%3Aopen%20label%3Abug) 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? ## Description Running Claude Code simultaneously in two different IntelliJ IDEA projects causes significant slowdowns and triggers the IDE memory warnin

[BUG] High memory consumption when running Claude Code in multiple IntelliJ projects

Status Open

Maintainer reply ✓ Yes — hackyon-anthropic

Activity 4 comments · opened Dec 3, 2025

💡 Likely answer: A maintainer (hackyon-anthropic, collaborator) responded on this thread — see the highlighted reply below.

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?

Description

Running Claude Code simultaneously in two different IntelliJ IDEA projects causes significant slowdowns and triggers the IDE memory warning: "The IDE is running low on memory and this might affect performance. Please consider increasing the heap size."

Environment

OS: macOS 26.1 (25B78)
Hardware: MacBook Pro M4
IDE: IntelliJ IDEA 2025.2.5 (Ultimate Edition)
Claude Code: 2.0.57

What Should Happen?

Claude Code should manage memory efficiently when running in multiple IDE instances without causing performance degradation or memory warnings.

Error Messages/Logs

The IDE is running low on memory and this might affect performance. Please consider increasing the heap size.

Steps to Reproduce

Open two projects in separate IntelliJ windows
Start Claude Code in both
Use Claude Code in each project

Claude Model

Sonnet (default)

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.0.57

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

IntelliJ IDEA terminal

Additional Information

_No response_

View original on GitHub ↗

4 Comments

github-actions[bot] · 9 months ago

Found 3 possible duplicate issues:

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🤖 Generated with Claude Code

hackyon-anthropic collaborator · 9 months ago

hey @smbpunt - is a recent regression for you? Are you able to reproduce the same high memory usage outside of the IDE?

github-actions[bot] · 7 months ago

This issue has been inactive for 30 days. If the issue is still occurring, please comment to let us know. Otherwise, this issue will be automatically closed in 30 days for housekeeping purposes.

mounan · 7 months ago

Still occuring