Windows OS version
Windows 11
ImageGlass version
latest
ImageGlass release
Classic
1️⃣ Steps to reproduce
- Go to ImageGlass performance settings/configuration.
- Ensure
UseEmbeddedThumbnailRawFormats is set to True (and set minimum dimensions to fallback values like 1920x1080).
- Open a folder containing uncompressed camera RAW files.
- Rapidly navigate through the images using the arrow keys or mouse wheel.
2️⃣ Actual behavior
There is a distinct, multi-second bottleneck/freeze or a prolonged "blurry mosaic" phase when advancing to the next file. System resources do not reflect active pre-loading of upcoming frames.
3️⃣ Expected behavior
The viewer should extract and paint the embedded preview image instantly, allowing for rapid culling/scrolling—matching the fluid performance seen in legacy C++ alternatives like FastStone Image Viewer or XnView MP.
4️⃣ Screenshots / Video / Sample image file
No response
5️⃣ Additional context
While the UseEmbeddedThumbnailRawFormats setting exists, the underlying framework pipeline or third-party decoding layers (such as Magick.NET) appear to add significant overhead before rendering the preview. A major optimization to bypass the full file pipeline for RAW file types during quick-browsing would vastly improve the app for hobbyist and professional photographers.
Windows OS version
Windows 11
ImageGlass version
latest
ImageGlass release
Classic
1️⃣ Steps to reproduce
UseEmbeddedThumbnailRawFormatsis set toTrue(and set minimum dimensions to fallback values like 1920x1080).2️⃣ Actual behavior
There is a distinct, multi-second bottleneck/freeze or a prolonged "blurry mosaic" phase when advancing to the next file. System resources do not reflect active pre-loading of upcoming frames.
3️⃣ Expected behavior
The viewer should extract and paint the embedded preview image instantly, allowing for rapid culling/scrolling—matching the fluid performance seen in legacy C++ alternatives like FastStone Image Viewer or XnView MP.
4️⃣ Screenshots / Video / Sample image file
No response
5️⃣ Additional context
While the
UseEmbeddedThumbnailRawFormatssetting exists, the underlying framework pipeline or third-party decoding layers (such as Magick.NET) appear to add significant overhead before rendering the preview. A major optimization to bypass the full file pipeline for RAW file types during quick-browsing would vastly improve the app for hobbyist and professional photographers.