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[BUG]: UI Freezes for a few minutes if repo has binary files #2696

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opened 2026-02-16 17:36:52 -05:00 by yindo · 1 comment
yindo commented 2026-02-16 17:36:52 -05:00
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Originally created by @istarkov on GitHub (Nov 8, 2025).

Description

Started here
https://github.com/sst/opencode/issues/3776#issuecomment-3506638135

If the agent generates binary files (for example, images),

https://github.com/sst/opencode/blob/34ff87d504836ff71b3bb2d466842c00ee3c5ec2/packages/opencode/src/snapshot/index.ts#L143

diffFull returns the binary content encoded as strings in the before and after fields.

A 4 MB image becomes a 20 MB+ string.

Image Image

This causes the UI to freeze for minutes likely due to memory allocation/copy etc issues after new prompt. (depends on amount of binary content)

There’s also a noticeable delay (a few seconds) when switching sessions (especially child sessions).

For AI related work it can be huge non binary files, such as CSVs and others.

⸻

What to do?

Fix
https://github.com/sst/opencode/pull/4109

OpenCode version

1.0.45

Steps to reproduce

Generate images or/and binary files

Screenshot and/or share link

https://github.com/sst/opencode/issues/3776#issuecomment-3506638135

Operating System

macOs 26

Terminal

iTerm 2

Originally created by @istarkov on GitHub (Nov 8, 2025). ### Description Started here https://github.com/sst/opencode/issues/3776#issuecomment-3506638135 If the agent generates binary files (for example, images), https://github.com/sst/opencode/blob/34ff87d504836ff71b3bb2d466842c00ee3c5ec2/packages/opencode/src/snapshot/index.ts#L143 diffFull returns the binary content encoded as strings in the before and after fields. A 4 MB image becomes a 20 MB+ string. <img width="455" height="267" alt="Image" src="https://github.com/user-attachments/assets/80c332e1-1c4f-415e-a351-bd52d6fde85d" /> <img width="327" height="225" alt="Image" src="https://github.com/user-attachments/assets/7cc8092a-9324-46a0-8f34-f79cc0b2381c" /> This causes the UI to freeze for minutes likely due to memory allocation/copy etc issues after new prompt. (depends on amount of binary content) There’s also a noticeable delay (a few seconds) when switching sessions (especially child sessions). For AI related work it can be huge non binary files, such as CSVs and others. ⸻ What to do? Fix https://github.com/sst/opencode/pull/4109 ### OpenCode version 1.0.45 ### Steps to reproduce Generate images or/and binary files ### Screenshot and/or share link https://github.com/sst/opencode/issues/3776#issuecomment-3506638135 ### Operating System macOs 26 ### Terminal iTerm 2
yindo added the opentuibug labels 2026-02-16 17:36:52 -05:00
yindo closed this issue 2026-02-16 17:36:52 -05:00
yindo commented 2026-02-16 17:36:52 -05:00
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@github-actions[bot] commented on GitHub (Nov 8, 2025):

This issue might be a duplicate of existing issues. Please check:

  • #3995: Single opencode session is consuming 23+GB of memory - Similar excessive memory consumption that could be caused by the same binary file diff storage issue
  • #3798: OpenTUI causes crashes and heavy memory usage - Reports 14GB memory usage leading to crashes and lag, potentially same root cause as binary file handling
  • #4061: Session hangs after file write tool execution with massive latency spike - Similar session hanging/freezing behavior that could be related to diff/snapshot handling

Feel free to ignore if none of these address your specific case.

@github-actions[bot] commented on GitHub (Nov 8, 2025): This issue might be a duplicate of existing issues. Please check: - #3995: Single opencode session is consuming 23+GB of memory - Similar excessive memory consumption that could be caused by the same binary file diff storage issue - #3798: OpenTUI causes crashes and heavy memory usage - Reports 14GB memory usage leading to crashes and lag, potentially same root cause as binary file handling - #4061: Session hangs after file write tool execution with massive latency spike - Similar session hanging/freezing behavior that could be related to diff/snapshot handling Feel free to ignore if none of these address your specific case.
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Reference: anomalyco/opencode#2696
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