UI becomes extremely slow in long conversations

[BLuFeNiX]

Before submitting your bug report

• I've tried using the "Ask AI" feature on the Continue docs site to see if the docs have an answer
• I'm not able to find a related conversation on GitHub discussions that reports the same bug
• I'm not able to find an open issue that reports the same bug
• I've seen the troubleshooting guide on the Continue Docs

Relevant environment info

- **OS:** Linux Mint 22.1 (Xia), x64
- **Continue version:** 1.2.22
- **IDE:** VS Code 1.110.1
- **Model:** Claude Opus 4.6
- **Config:**

name: Bedrock
version: 1.0.5
schema: v1
models:
  - name: Claude Opus 4.6
    provider: bedrock
    model: us.anthropic.claude-opus-4-6-v1
    roles:
      - chat
      - edit
      - apply
    defaultCompletionOptions:
      contextLength: 1000000
    capabilities:
      - tool_use
      - image_input

Description

The Continue chat UI becomes progressively slower as a conversation grows in length. Loading the chat window, switching between conversations, and navigating the settings menu is sluggish. This occurs even after using the "compress" feature to reduce context length, indicating the problem is not related to the size of the context window being sent to the model.

Creating a new conversation and closing old conversation tabs will alleviate the problem.

To reproduce

1. Have a very long conversation (500k tokens or more, with multiple compressions)
2. Observe increasing UI sluggishness: slow chat loading, laggy settings menu,
   slow conversation switching.
3. Compress the conversation context via the built-in compress feature.
4. Observe: the UI remains just as slow despite the reduced context.

Log output

No response