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fix(lut): remove backdrop-blur from LUT swatch labels to fix UI lag on Linux - #1969
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backdrop-blur-xs on every swatch label is recomputed each frame when WebKitGTK renders on the CPU, making the UI very slow with the LUT panel open. Co-Authored-By: Claude Sonnet 5.5 <[email protected]>
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LGTM :) |
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Description
Opening the LUT panel makes the UI very slow on Linux (WebKitGTK), and the CPU load gets high while scrolling or hovering. Collapsing the panel makes it smooth again. With many LUTs imported, the whole app hangs.
Every LUT swatch label has
backdrop-blur-xs, and the blur has to be recomputed whenever the swatches are redrawn, so the cost grows with the number of LUTs. A WebKit timeline shows the load on the compositor thread, not on the JS main thread or in memory, and the backend renders the swatch previews in well under a millisecond each. Removing the blur on the swatch labels fixes the lag.Related to #1920.
Type of Change
Changes Made
backdrop-blur-xsfrom the swatch name label insrc/components/ui/LUTControl.tsx. The label keeps itsbg-black/60background, so the text stays readable.Testing
Test Configuration:
Checklist
Additional Notes
Tested on Linux only.
AI Disclaimer:
🤖 Generated with Claude Code