Noi 1.1.0/1.0.0 high idle cpu usage

[stl3]

Win10 22H2 19045.4291
Noi 1.1.0

The only way I've been able to run this (both 1.0.0 and 1.1.0) was to:

1. Launch Noi through Sandboxie
2. Quit Noi
3. Launch Noi one more time through Sandboxie
4. Idle Cpu problem goes away

Sometimes these steps take a few times before I am able to get it not using cpu while idle.

|Name|    |Process ID|   |Title|   |Status|   |Info|     |Path / Command Line|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     

Noi.exe   16240                    Running    20:51:09   "C:\Users\Administrator\AppData\Local\noi\app-1.1.0\Noi.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --user-data-dir="C:\Users\Administrator\AppData\Roaming\Noi" --standard-schemes=noi --secure-schemes=noi --bypasscsp-schemes=noi --cors-schemes=noi --fetch-schemes=noi --service-worker-schemes=noi --streaming-schemes=noi --code-cache-schemes=noi --field-trial-handle=1948,i,1685289429042257034,8017658900066552474,262144 --enable-features=EnableTransparentHwndEnlargement,PdfUseShowSaveFilePicker --disable-features=LocalNetworkAccessChecks,ScreenAIOCREnabled,SpareRendererForSitePerProcess,TraceSiteInstanceGetProcessCreation --variations-seed-version --trace-process-track-uuid=3190708989122997041 --mojo-platform-channel-handle=2292 /prefetch:3                                                                                                                                                                                                                                                                                                              
Noi.exe   26104                    Running    20:51:09   "C:\Users\Administrator\AppData\Local\noi\app-1.1.0\Noi.exe" --type=renderer --user-data-dir="C:\Users\Administrator\AppData\Roaming\Noi" --standard-schemes=noi --secure-schemes=noi --bypasscsp-schemes=noi --cors-schemes=noi --fetch-schemes=noi --service-worker-schemes=noi --streaming-schemes=noi --code-cache-schemes=noi --app-user-model-id=com.squirrel.noi.Noi --app-path="C:\Users\Administrator\AppData\Local\noi\app-1.1.0\resources\app.asar" --no-sandbox --no-zygote --video-capture-use-gpu-memory-buffer --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=6 --time-ticks-at-unix-epoch=-1766737417183343 --launch-time-ticks=1744052605206 --field-trial-handle=1948,i,1685289429042257034,8017658900066552474,262144 --enable-features=EnableTransparentHwndEnlargement,PdfUseShowSaveFilePicker --disable-features=LocalNetworkAccessChecks,ScreenAIOCREnabled,SpareRendererForSitePerProcess,TraceSiteInstanceGetProcessCreation --variations-seed-version --trace-process-track-uuid=3190708991934122588 --mojo-platform-channel-handle=4132 /prefetch:1   
Noi.exe   37156                    Running    20:51:10   "C:\Users\Administrator\AppData\Local\noi\app-1.1.0\Noi.exe" --type=renderer --user-data-dir="C:\Users\Administrator\AppData\Roaming\Noi" --standard-schemes=noi --secure-schemes=noi --bypasscsp-schemes=noi --cors-schemes=noi --fetch-schemes=noi --service-worker-schemes=noi --streaming-schemes=noi --code-cache-schemes=noi --app-user-model-id=com.squirrel.noi.Noi --app-path="C:\Users\Administrator\AppData\Local\noi\app-1.1.0\resources\app.asar" --no-sandbox --no-zygote --video-capture-use-gpu-memory-buffer --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=8 --time-ticks-at-unix-epoch=-1766737417183343 --launch-time-ticks=1744053385708 --field-trial-handle=1948,i,1685289429042257034,8017658900066552474,262144 --enable-features=EnableTransparentHwndEnlargement,PdfUseShowSaveFilePicker --disable-features=LocalNetworkAccessChecks,ScreenAIOCREnabled,SpareRendererForSitePerProcess,TraceSiteInstanceGetProcessCreation --variations-seed-version --trace-process-track-uuid=3190708993808206286 --mojo-platform-channel-handle=4552 /prefetch:1   
Noi.exe   46668                    Running    20:51:09   "C:\Users\Administrator\AppData\Local\noi\app-1.1.0\Noi.exe" --type=renderer --user-data-dir="C:\Users\Administrator\AppData\Roaming\Noi" --standard-schemes=noi --secure-schemes=noi --bypasscsp-schemes=noi --cors-schemes=noi --fetch-schemes=noi --service-worker-schemes=noi --streaming-schemes=noi --code-cache-schemes=noi --app-user-model-id=com.squirrel.noi.Noi --app-path="C:\Users\Administrator\AppData\Local\noi\app-1.1.0\resources\app.asar" --no-sandbox --no-zygote --video-capture-use-gpu-memory-buffer --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=4 --time-ticks-at-unix-epoch=-1766737417183343 --launch-time-ticks=1744052553286 --field-trial-handle=1948,i,1685289429042257034,8017658900066552474,262144 --enable-features=EnableTransparentHwndEnlargement,PdfUseShowSaveFilePicker --disable-features=LocalNetworkAccessChecks,ScreenAIOCREnabled,SpareRendererForSitePerProcess,TraceSiteInstanceGetProcessCreation --variations-seed-version --trace-process-track-uuid=3190708990060038890 --mojo-platform-channel-handle=3804 /prefetch:1   
Noi.exe   47896                    Running    20:51:11   "C:\Users\Administrator\AppData\Local\noi\app-1.1.0\Noi.exe" --type=gpu-process --user-data-dir="C:\Users\Administrator\AppData\Roaming\Noi" --gpu-preferences=SAAAAAAAAADgAAAEAAAAAAAAAAAAAGAAAAAAAAAAAAAAAAAAAAAAAAIAAAAAAAAAAAAAAAAAAAAQAAAAAAAAABAAAAAAAAAACAAAAAAAAAAIAAAAAAAAAA== --use-gl=angle --use-angle=swiftshader-webgl --field-trial-handle=1948,i,1685289429042257034,8017658900066552474,262144 --enable-features=EnableTransparentHwndEnlargement,PdfUseShowSaveFilePicker --disable-features=LocalNetworkAccessChecks,ScreenAIOCREnabled,SpareRendererForSitePerProcess,TraceSiteInstanceGetProcessCreation --variations-seed-version --trace-process-track-uuid=3190708995682289984 --mojo-platform-channel-handle=4540 /prefetch:2                                                                                                                                                                                                                                                                                                                                                                                                    
Noi.exe   57020                    Running    20:51:08   "C:\Users\Administrator\AppData\Local\noi\app-1.1.0\Noi.exe"                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              

And this is what it looks when the idle cpu usage is good:

Running Noi directly (not using Sandboxie)

|Name|    |Process ID|   |Title|   |Status|   |Info|     |Path / Command Line|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     

Noi.exe   31632                    Running    20:52:19   "C:\Users\Administrator\AppData\Local\noi\app-1.1.0\Noi.exe" --type=renderer --user-data-dir="C:\Users\Administrator\AppData\Roaming\Noi" --standard-schemes=noi --secure-schemes=noi --bypasscsp-schemes=noi --cors-schemes=noi --fetch-schemes=noi --service-worker-schemes=noi --streaming-schemes=noi --code-cache-schemes=noi --app-user-model-id=com.squirrel.noi.Noi --app-path="C:\Users\Administrator\AppData\Local\noi\app-1.1.0\resources\app.asar" --no-sandbox --no-zygote --video-capture-use-gpu-memory-buffer --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=6 --time-ticks-at-unix-epoch=-1766737417183342 --launch-time-ticks=1744122811699 --field-trial-handle=1924,i,7834700414373947189,3997312637658816660,262144 --enable-features=EnableTransparentHwndEnlargement,PdfUseShowSaveFilePicker --disable-features=LocalNetworkAccessChecks,ScreenAIOCREnabled,SpareRendererForSitePerProcess,TraceSiteInstanceGetProcessCreation --variations-seed-version --trace-process-track-uuid=3190708991934122588 --mojo-platform-channel-handle=4208 /prefetch:1   
Noi.exe   34756                    Running    20:52:19   "C:\Users\Administrator\AppData\Local\noi\app-1.1.0\Noi.exe" --type=renderer --user-data-dir="C:\Users\Administrator\AppData\Roaming\Noi" --standard-schemes=noi --secure-schemes=noi --bypasscsp-schemes=noi --cors-schemes=noi --fetch-schemes=noi --service-worker-schemes=noi --streaming-schemes=noi --code-cache-schemes=noi --app-user-model-id=com.squirrel.noi.Noi --app-path="C:\Users\Administrator\AppData\Local\noi\app-1.1.0\resources\app.asar" --no-sandbox --no-zygote --video-capture-use-gpu-memory-buffer --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=4 --time-ticks-at-unix-epoch=-1766737417183342 --launch-time-ticks=1744122760919 --field-trial-handle=1924,i,7834700414373947189,3997312637658816660,262144 --enable-features=EnableTransparentHwndEnlargement,PdfUseShowSaveFilePicker --disable-features=LocalNetworkAccessChecks,ScreenAIOCREnabled,SpareRendererForSitePerProcess,TraceSiteInstanceGetProcessCreation --variations-seed-version --trace-process-track-uuid=3190708990060038890 --mojo-platform-channel-handle=3808 /prefetch:1   
Noi.exe   38812                    Running    20:52:19   "C:\Users\Administrator\AppData\Local\noi\app-1.1.0\Noi.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --user-data-dir="C:\Users\Administrator\AppData\Roaming\Noi" --standard-schemes=noi --secure-schemes=noi --bypasscsp-schemes=noi --cors-schemes=noi --fetch-schemes=noi --service-worker-schemes=noi --streaming-schemes=noi --code-cache-schemes=noi --field-trial-handle=1924,i,7834700414373947189,3997312637658816660,262144 --enable-features=EnableTransparentHwndEnlargement,PdfUseShowSaveFilePicker --disable-features=LocalNetworkAccessChecks,ScreenAIOCREnabled,SpareRendererForSitePerProcess,TraceSiteInstanceGetProcessCreation --variations-seed-version --trace-process-track-uuid=3190708989122997041 --mojo-platform-channel-handle=2084 /prefetch:3                                                                                                                                                                                                                                                                                                              
Noi.exe   52964                    Running    20:52:20   "C:\Users\Administrator\AppData\Local\noi\app-1.1.0\Noi.exe" --type=renderer --user-data-dir="C:\Users\Administrator\AppData\Roaming\Noi" --standard-schemes=noi --secure-schemes=noi --bypasscsp-schemes=noi --cors-schemes=noi --fetch-schemes=noi --service-worker-schemes=noi --streaming-schemes=noi --code-cache-schemes=noi --app-user-model-id=com.squirrel.noi.Noi --app-path="C:\Users\Administrator\AppData\Local\noi\app-1.1.0\resources\app.asar" --no-sandbox --no-zygote --video-capture-use-gpu-memory-buffer --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=8 --time-ticks-at-unix-epoch=-1766737417183342 --launch-time-ticks=1744123508336 --field-trial-handle=1924,i,7834700414373947189,3997312637658816660,262144 --enable-features=EnableTransparentHwndEnlargement,PdfUseShowSaveFilePicker --disable-features=LocalNetworkAccessChecks,ScreenAIOCREnabled,SpareRendererForSitePerProcess,TraceSiteInstanceGetProcessCreation --variations-seed-version --trace-process-track-uuid=3190708993808206286 --mojo-platform-channel-handle=4056 /prefetch:1   
Noi.exe   54660                    Running    20:52:22   "C:\Users\Administrator\AppData\Local\noi\app-1.1.0\Noi.exe" --type=gpu-process --user-data-dir="C:\Users\Administrator\AppData\Roaming\Noi" --gpu-preferences=SAAAAAAAAADgAAAEAAAAAAAAAAAAAGAAAAAAAAAAAAAAAAAAAAAAAAIAAAAAAAAAAAAAAAAAAAAQAAAAAAAAABAAAAAAAAAACAAAAAAAAAAIAAAAAAAAAA== --use-gl=angle --use-angle=swiftshader-webgl --field-trial-handle=1924,i,7834700414373947189,3997312637658816660,262144 --enable-features=EnableTransparentHwndEnlargement,PdfUseShowSaveFilePicker --disable-features=LocalNetworkAccessChecks,ScreenAIOCREnabled,SpareRendererForSitePerProcess,TraceSiteInstanceGetProcessCreation --variations-seed-version --trace-process-track-uuid=3190708995682289984 --mojo-platform-channel-handle=4888 /prefetch:2                                                                                                                                                                                                                                                                                                                                                                                                    
Noi.exe   47344                    Running    20:52:18   "C:\Users\Administrator\AppData\Local\noi\app-1.1.0\Noi.exe"                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              

It is usually C:\Users\Administrator\AppData\Local\noi\app-1.1.0\Noi.exe or the C:\Users\Administrator\AppData\Local\noi\app-1.1.0\Noi.exe" --type=gpu-process (command snipped) command lines that are causing high idle cpu usage.

The command lines with high idle cpu usage and normal idle cpu usage does not look any different so I don't know what the culprit would be. I don't know if the [#] Noi [#] not showing up could be a hint of maybe something stuck/not loading. I notice the ram usage is also higher during this time.

Anyone else able to figure out what's been causing this issue yet? The behavior still exists in 1.1.0 as it did in 1.0.0.
(Note: without Sandboxie I am not able to get normal idle cpu usage).

[lencx]

I’ve received multiple reports of high CPU usage on Windows. Unfortunately, I don’t currently have access to a Windows PC, so I’m unable to reproduce the issue or run reliable profiling on my side.

Performance is stable on macOS, which suggests this may be related to Windows-specific API behavior or compatibility differences. As a quick mitigation, please try disabling texture rendering in the theme and re-test—switching the theme style to mono or solo may reduce CPU usage.

[lencx]

Based on user reports so far, it’s fairly clear that the high CPU usage is coming from the main process. However, the main-process logic is the same on macOS and Linux, so it may require real-world testing on Windows to narrow down the root cause further.