Your users don't have your phone
Why we test every launch on budget devices, and the three techniques that keep heavy, animated sites smooth on them.
1 min read
Design reviews usually happen on a new laptop or a flagship phone. Your visitors, especially from paid campaigns, often arrive on a three-year-old budget device with a weak GPU. If the site stutters there, the campaign budget leaks.
Measure, then decide
We detect a rough performance tier on the first visit and adapt: lighter images, fewer blurs and simpler motion on weak devices. Everyone gets the same content, just a different amount of decoration.
- Pause what nobody sees. Animations behind an open overlay stop painting until the overlay closes.
- Serve the right image size. A phone never needs the 4K hero photo.
- Prefer CSS over JavaScript for accordions and transitions, so they stay smooth while the main thread is busy.
“Performance is a feature your users notice only when it's missing.”
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