Preview Engine
Beta Status
Phosor is currently in an Internal Beta stage. Features may change before the public release. Performance may occasionally be inconsistent depending on hardware, image formats, and library size. Unexpected bugs may still occur. Feedback from beta testers is highly appreciated.
Phosor's preview engine is designed for speed. Photos appear quickly after loading, and frequently viewed images reopen instantly. This page describes the preview behavior for different image types and how navigation stays responsive.
Preview Loading by Format
Standard Images (JPEG, PNG, WebP)
Previews appear quickly after loading. Smaller web-ready images open nearly instantly.
RAW Files
RAW files are displayed and sorted like any other supported image. Performance is comparable to standard image preview generation.
Frequently Viewed Images
Reopen instantly. Once a photo has been viewed, returning to it is immediate.
Adjacent Photos
Preloaded in the background after each navigation, so the next photo is often ready before you navigate to it.
Navigation Responsiveness
- Rapid key presses do not cause flickering or stale image display.
- The viewer remains stable even during fast navigation.
Smooth navigation
Even during rapid key presses, the viewer remains stable. You can navigate as fast as you can press keys without visual artifacts.
Memory Management
- Background memory use is automatically limited to keep the application lightweight.
- The application is designed to handle long sorting sessions without significant lag.
Large JPEG files
Very large JPEG files may cause memory spikes. See Performance for details.
Batch Move Performance
- File moves are processed with real-time progress updates.
- A single file failure never aborts the entire batch — the operation continues with remaining files.