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Bump GPU scheduling priority for responsiveness vs background apps - #27
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…ound apps (#26) Less-responsive (laggy, not stuttery) zoom when a GPU-heavy app (a game, even paused) runs in the background is GPU contention: our render engine does GPU work every zoomed frame and queues behind the background app's. IDXGIDevice:: SetGPUThreadPriority lets the GPU scheduler favor the magnifier. New gpuPriority config (default 7, clamped -7..7; 0=OS default), applied at init. Lower it if it hurts a foreground game while zoomed. Won't match the Windows Magnifier (privileged hardware-scanout path), but narrows the gap. build.bat test: 32 cases / 97 assertions; render log confirms it's applied. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This was referenced May 25, 2026
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Closes #26. Adds
SetGPUThreadPriority(gpuPriority config, default 7) so the zoom stays responsive when a GPU-heavy app runs in the background (GPU contention). Configurable/clampable; lower if it hurts a foreground game while zoomed. 32 tests pass. Needs on-machine A/B in the game scenario.🤖 Generated with Claude Code