[BUG] VS Code Terminal - Claude Code sluggish when typing

[joeperuzzi]

Preflight Checklist

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

What's Wrong?

When I type into Claude code cli that is opened within a vscode terminal, it takes a second for any keystroke I type to actually type out on the screen. I could type 4 letters one after the other, but they would type out 1 at a time and take 10 seconds to get all 4 characters to type out. This is not a system resource issue, not other software input has this issue (as i type this bug the keyboard is acting fine), only the Claude cli input while in vscode. The claude CLI from a regular terminal window types just fine.

What Should Happen?

The interface should instantly react to my keyboard, it should not take. 2 or 3 seconds to delete a character.

Error Messages/Logs

Steps to Reproduce

Open VSCode on MAC M Chip
Start new Terminal Window
Open Claude CLI by typing: claude
Start tying words: The input should not "catch up" to all the letters i just typed.

Claude Model

Sonnet (default)

Is this a regression?

Yes, this worked in a previous version

Last Working Version

2.0.71

Claude Code Version

2.0.72

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

VS Code integrated terminal

Additional Information

No response

[github-actions]

Found 3 possible duplicate issues:

1. [BUG] input lag while typing in v2.0.72 #14413
2. [BUG] Input latency severely affected by API response times - typing becomes unusable during API slowdowns #14461
3. [BUG] Performance regression in v2.0.72 - slow input/response with ~30k tokens context #14476

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🤖 Generated with Claude Code

[uermel]

Experiencing the same when using claude code in the PyCharm terminal (PyCharm 2025.3) with claude code 2.0.74 on MacOS 15.7.2. This bug gets worse with long conversations and makes claude code barely usable at that stage.

[itinance]

having the same, no matter which terminal (iTerm2, Terminal.app, Cursor, Jetbrains IDEs, auto-claude terminals)

[itinance]

any news on this?

[kaansoral]

Bizarre++ that this is still not fixed

[develonrails]

i had the same when projects go bigger, following this guide (https://medium.com/@j.y.weng/when-your-claude-code-becomes-terribly-slow-over-time-cb9e11e50447) i removed a lot of old data. claude is much more responsive now. I had claude code do it itself instead of another ai assistant like gemini. Just pointed him to ~/.claude.json and let him do its work. Not sure if it is a permanent fix, but atleast it made claude code usable again.

[olejorgenb]

It's not near as bad as OP describe, but I notice that in one of the recent upgrades the typing-latency has become worse.