<!DOCTYPE html>
<div id="container" style="width: 200px; height: 400px; border-radius: 80px; overflow: auto; will-change: transform">
<div style="height: 1000px; background: blue"></div>
</div>
<!DOCTYPE html>
<div id="container" style="width: 200px; height: 400px; border-radius: 80px; overflow: auto; will-change: transform">
<div style="height: 1000px; background: blue"></div>
</div>