Jakub Antalik, the creator of Transitions.dev, has shared technical insights regarding performance lags in UI transitions. According to Antalik, lag often occurs when a blur effect is re-run every frame or when a mask forces a repaint.

The analysis indicates that animating mask-position prevents compositing and instead forces the element to be repainted. Because the element resides within a displacement chain, the entire filter re-executes on the CPU each frame, compounding the performance cost.

To resolve this, Antalik suggests ensuring that the animated property avoids the paint path entirely. One proposed method is to paint the field statically and cover it with a same-colored "curtain," then use transformations to translate the curtain. While this approach means waves travel with the band rather than rippling through fixed noise, the visual difference is considered indistinguishable in motion.

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