What happened?
What happened?
A desktop application (Money Manager Ex 1.9.3, built with wxWidgets, using wxWebView with the WebView2 backend on Windows) shows several seconds of delay whenever it renders HTML-based content (dashboard/report charts). Native, non-web UI parts of the same application (list views, forms) are instant. The delay is reproducible every time this WebView2-based content is displayed.
Environment
- CPU/iGPU: Intel Core Ultra 7 256V (Lunar Lake), Intel Arc 140V graphics
- Intel Graphics driver version: 32.0.101.8860 (issue persists with this driver, previously also present with earlier versions)
- OS: Windows 11
- Application: Money Manager Ex 1.9.3 (wxWidgets 3.3.3, wxWebView/WebView2)
- Data source: a small local SQLite file (522 KB) — ruled out as the cause, as non-WebView2 parts of the app remain instant
Workaround found
Setting the environment variable before launching the app completely resolves the issue:
WEBVIEW2_ADDITIONAL_BROWSER_ARGUMENTS=--use-angle=swiftshader
This forces WebView2 to use software rendering instead of the default GPU-accelerated ANGLE backend, and the slowness disappears entirely.
Expected behavior
WebView2 GPU-accelerated rendering (default ANGLE backend) should not introduce multi-second delays on Intel Core Ultra 200V / Arc iGPU hardware.
Additional context
This appears related to other reported issues involving Intel Arc/iGPU and WebView2 GPU process synchronization (e.g. similar symptoms reported on Intel's community forum for Task Manager on Core Ultra + hybrid/Arc graphics, partially fixed in Intel driver 32.0.101.8724, but this specific WebView2 rendering delay persists on newer drivers).
Importance
Important. My app's user experience is significantly compromised.
Runtime Channel
Stable release (WebView2 Runtime)
Runtime Version
152.0.4191.53
SDK Version
No response
Framework
Win32
Operating System
Windows 11
OS Version
26200.9168
Repro steps
Steps to reproduce:
- Open Money Manager Ex 1.9.3 (wxWidgets 3.3.3 desktop app, uses wxWebView with WebView2 backend for its 仪表盘 and Reports screens)
- Navigate to the 仪表盘 or any Report screen (these render HTML/JS-based charts via WebView2)
- Observe a delay of several seconds before the content appears
Native, non-web parts of the same app (account lists, forms) are instant, so this is isolated to the WebView2-rendered views.
Expected behavior:
WebView2 content should render without multi-second delays.
Actual behavior:
Several seconds of delay every time WebView2-based content is displayed.
Environment:
- CPU/iGPU: Intel Core Ultra 7 256V (Lunar Lake), Intel Arc 140V graphics
- Intel Graphics driver version: 32.0.101.8860
- Data source: small local SQLite file (522 KB) — ruled out as the cause, since non-WebView2 parts of the app are instant
Workaround found:
Setting this environment variable before launching the app completely resolves the issue:
WEBVIEW2_ADDITIONAL_BROWSER_ARGUMENTS=--use-angle=swiftshader
This forces WebView2 to use software rendering instead of the default GPU-accelerated ANGLE backend, and the slowness disappears entirely — confirming the issue is in the GPU-accelerated rendering path on this hardware.
Additional context:
This may be related to other reported Intel Arc/Core Ultra + WebView2/hybrid-graphics synchronization issues (e.g. similar symptoms reported on Intel's community forum regarding Task Manager delays on Core Ultra + Arc, partially fixed in Intel driver 32.0.101.8724 — but this WebView2 rendering delay persists on newer drivers).
Repros in Edge Browser
No, issue does not reproduce in the corresponding Edge version
Regression
No, this never worked
Last working version (if regression)
No response
What happened?
What happened?
A desktop application (Money Manager Ex 1.9.3, built with wxWidgets, using wxWebView with the WebView2 backend on Windows) shows several seconds of delay whenever it renders HTML-based content (dashboard/report charts). Native, non-web UI parts of the same application (list views, forms) are instant. The delay is reproducible every time this WebView2-based content is displayed.
Environment
Workaround found
Setting the environment variable before launching the app completely resolves the issue:
WEBVIEW2_ADDITIONAL_BROWSER_ARGUMENTS=--use-angle=swiftshader
This forces WebView2 to use software rendering instead of the default GPU-accelerated ANGLE backend, and the slowness disappears entirely.
Expected behavior
WebView2 GPU-accelerated rendering (default ANGLE backend) should not introduce multi-second delays on Intel Core Ultra 200V / Arc iGPU hardware.
Additional context
This appears related to other reported issues involving Intel Arc/iGPU and WebView2 GPU process synchronization (e.g. similar symptoms reported on Intel's community forum for Task Manager on Core Ultra + hybrid/Arc graphics, partially fixed in Intel driver 32.0.101.8724, but this specific WebView2 rendering delay persists on newer drivers).
Importance
Important. My app's user experience is significantly compromised.
Runtime Channel
Stable release (WebView2 Runtime)
Runtime Version
152.0.4191.53
SDK Version
No response
Framework
Win32
Operating System
Windows 11
OS Version
26200.9168
Repro steps
Steps to reproduce:
Native, non-web parts of the same app (account lists, forms) are instant, so this is isolated to the WebView2-rendered views.
Expected behavior:
WebView2 content should render without multi-second delays.
Actual behavior:
Several seconds of delay every time WebView2-based content is displayed.
Environment:
Workaround found:
Setting this environment variable before launching the app completely resolves the issue:
WEBVIEW2_ADDITIONAL_BROWSER_ARGUMENTS=--use-angle=swiftshader
This forces WebView2 to use software rendering instead of the default GPU-accelerated ANGLE backend, and the slowness disappears entirely — confirming the issue is in the GPU-accelerated rendering path on this hardware.
Additional context:
This may be related to other reported Intel Arc/Core Ultra + WebView2/hybrid-graphics synchronization issues (e.g. similar symptoms reported on Intel's community forum regarding Task Manager delays on Core Ultra + Arc, partially fixed in Intel driver 32.0.101.8724 — but this WebView2 rendering delay persists on newer drivers).
Repros in Edge Browser
No, issue does not reproduce in the corresponding Edge version
Regression
No, this never worked
Last working version (if regression)
No response