[BUG] Extremely sluggish performance and freezes

[Awwtifishal]

Problem (one or two sentences)

A few versions ago, each thinking section was contained to a little box and now it's in the main log without an option to collapse it. As a result the performance is terrible and sometimes it freezes completely, not to mention the bad UX when navigating the log. Related issue #7879 which happened when it was a little box.

Context (who is affected and when)

Anyone running a reasoning model

Reproduction steps

Just use a reasoning model for a while. You can probably test with a very small one like Qwen3-4B-Thinking-2507, I mostly used the big one Qwen3-235B-A22B-Thinking-2507

Expected result

Manageable UI

Actual result

Slow and sluggish UI that sometimes freeze

Variations tried (optional)

No response

App Version

0.0.6839

API Provider (optional)

None

Model Used (optional)

Qwen3-235B-A22B-Thinking-2507

Roo Code Task Links (optional)

No response

Relevant logs or errors (optional)

[roomote]

I'm exploring a potential fix for the performance issues with reasoning model thinking sections. I'll work on restoring the collapsible functionality to improve UI responsiveness.

[roomote]

I've opened PR #8068 with a fix for the performance issues: #8068

The solution adds collapsible functionality to the ReasoningBlock component, allowing users to collapse thinking sections to improve UI responsiveness. The content is only rendered when expanded, which should significantly reduce the performance impact of large thinking sections.

All tests are passing and the initial CI checks look good. Feedback welcome!

[Awwtifishal]

Cool, thank you! Could you take another look at #7879 and reopen it? Since it would be relevant once again.

[daniel-lxs]

We are considering adding a toggle that lets you collapse all the reasoning blocks so it behaves like it was before. I'll close this issue for now while we figure out how to do this.

Thank you for reporting it!