windows vscode opencode extension process freeze

[caozhiyuan]

Description

windows vscode opencode extension process freeze: when switching vscode to the background (for example, opening a browser and working for a while), after some time returning to vscode, the opencode extension window becomes unresponsive. The vscode subprocess consistently uses 25% CPU.

Plugins

No response

OpenCode version

1.1.27

Steps to reproduce

1. let opencode run some task in vscode extension opencode
2. opening a browser and working for a while
3. back to vscode

Screenshot and/or share link

No response

Operating System

windows 11

Terminal

pwsh

[github-actions]

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

• opencode crashes over and over #9599: opencode crashes over and over (also Windows-specific with high CPU usage and 25%+ CPU consumption)
• High CPU usage just by waiting user input #8667: High CPU usage just by waiting user input (Windows/VSCode environment, CPU spike during idle)
• Screen lag/freezing when typing text (WSL2, TMUX, Alacritty) #8484: Screen lag/freezing when typing text (Windows 11, freezing behavior)
• Severe scroll lag in VSCode/Cursor integrated terminal on WSL2 after large output (unusable for minutes) #7893: Severe scroll lag in VSCode integrated terminal on WSL2 (VSCode unresponsiveness on Windows 11)
• High CPU usage (100%+) during LLM streaming in long sessions due to O(n) text buffer rendering #6172: High CPU usage during LLM streaming (root cause analysis showing O(n) text buffer rendering causing sustained CPU)

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

[caozhiyuan]

@rekram1-node There is no issue when opening outside the VSCode internal terminal; however, when opening within VSCode and using it for a while, it causes the VSCode subprocess CPU usage to spike to about 25%, after which the OpenCode interface freezes.

[caozhiyuan]

Problem process:
CommandLine="C:\Users\xxx\AppData\Local\Programs\Microsoft VS Code\Code.exe" --type=renderer --user-data-dir="C:\Users\xxx\AppData\Roaming\Code" --standard-schemes=vscode-webview,vscode-file --enable-sandbox --secure-schemes=vscode-webview,vscode-file --cors-schemes=vscode-webview,vscode-file --fetch-schemes=vscode-webview,vscode-file --service-worker-schemes=vscode-webview --code-cache-schemes=vscode-webview,vscode-file --app-user-model-id=Microsoft.VisualStudioCode --app-path="C:\Users\xxx\AppData\Local\Programs\Microsoft VS Code\resources\app" --enable-sandbox --enable-blink-features=HighlightAPI --max-active-webgl-contexts=32 --disable-blink-features=FontMatchingCTMigration,StandardizedBrowserZoom, --video-capture-use-gpu-memory-buffer --lang=en-US --device-scale-factor=2.5 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=4 --time-ticks-at-unix-epoch=-1767168900234389 --launch-time-ticks=1796835869402 --field-trial-handle=1836,i,1728646702783304408,6593918439366806803,262144 --enable-features=DocumentPolicyIncludeJSCallStacksInCrashReports,EarlyEstablishGpuChannel,EnableTransparentHwndEnlargement,EstablishGpuChannelAsync --disable-features=CalculateNativeWinOcclusion,LocalNetworkAccessChecks,ScreenAIOCREnabled,SpareRendererForSitePerProcess,TraceSiteInstanceGetProcessCreation --variations-seed-version --trace-process-track-uuid=3190708990060038890 --mojo-platform-channel-handle=3284 --vscode-window-config=vscode:32c12368-c66b-4e8a-8e2c-02b8a5d68d02 /prefetch:1

[caozhiyuan]

after disable animations , The process will not hang now @rekram1-node

[caozhiyuan]

also set OPENCODE_DISABLE_TERMINAL_TITLE=1