These tricks are device dependent....
Power management stutter bugs are surprisingly common.
Laptops and phones are sometimes a power management PITA. TestUFO uses only a tiny % of a GPU which puts GPUs to sleep which makes them stutter bad. “Precise + low power” is often mutually exclusive, so power management makes mistaken decision on priorities when trying to save power.
Even for my Razer 240Hz laptop, it is unreliable until I (A) force Performance Mode, or (B) run a 2nd app alongside in background to “wake” the GPU. Then it instantly snaps TestUFO-perfect.
In the future, I may have to add a power-eater surge (e.g. 3D cutscene) just to rev the motor from its stuttery battery-miser state.
Low-power animations and videos that use less than 10-20% of GPU sometimes put the GPU into a low performance mode that is battery-friendly but stutters like bleep.
Let me guess....older Galaxy bogged down with an old Android, possibly. But I’ve seen fresh iPhones stutter (with embeds). It doesn’t happen on anSamsung Galaxy S10 or newer, fresh phone? Those seemed to havr stutter-free power management, but even not all Galaxy did. Discount Android phones have had wonky power management.
TestUFO embeds like this also stutter on iPhones unless I intentionally put them in pause mode. Which I programmed TestUFO to. That forces the user to tap in order to start the animation, and the act of screen touching woke up the GPU. Simple and clever!
On desktop, above TestUFO animation autoplays.
On mobiles, it starts paused first. (As a workaround to fix the stutter issue on iOS)
Does it stutter super badly (like 30-40fps) right at the start on your Android when pressing the Play button? This may not help if you launch
www.testufo.com in some mobile browsers, however, hopefully embeds don’t stutter badly (at least for the first 30 seconds after touching screen)
Reinstalls do help sometimes, but I wonder if power-management-adjustment apps also work?