windows vscode opencode extension process freeze #9622

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1. caozhiyuan

   added

   bugSomething isn't workingSomething isn't working

   on Jan 20, 2026
2. github-actions

   assigned

   rekram1-node

   on Jan 20, 2026
3. github-actions

   added

   perfIndicates a performance issue or need for optimizationIndicates a performance issue or need for optimization

   windows

   on Jan 20, 2026
4. github-actions commented on Jan 20, 2026

   

   github-actionsBot

   on Jan 20, 2026 – with GitHub Actions

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   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.
5. caozhiyuan commented on Jan 21, 2026

   

   caozhiyuan

   on Jan 21, 2026

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   @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.
6. caozhiyuan commented on Jan 21, 2026

   

   caozhiyuan

   on Jan 21, 2026

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   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
7. caozhiyuan commented on Jan 21, 2026

   

   caozhiyuan

   on Jan 21, 2026

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

   closed this as completedon Jan 21, 2026
9. caozhiyuan commented on Jan 21, 2026

   

   caozhiyuan

   on Jan 21, 2026

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   also set OPENCODE_DISABLE_TERMINAL_TITLE=1