Reduce motion is on · previews stay still
High-DPR overdraw
Fans spin and frames drop on Retina screens while normal screens stay smooth.
Cards that use this check
0 cards, 0 with it as the free first checkAbout this collection
Why it happens
renderer.setPixelRatio(window.devicePixelRatio) has no cap, so a 3x screen draws 9x the pixels.
Check / fix block
FreeCheck: setPixelRatio(Math.min(devicePixelRatio, 2)); on a DPR 3 device the frame rate stays at 70% or more of DPR 1.
The library itself is public. On a card, the first check is free; the rest and the contact sheet are Pro.