溢出怎么样：隐藏;容器上的＆border-radius导致容器内的“Paint / Render Layer”大幅减速，仅在IE上？

I've been having a lot of trouble with bad performance on IE (all versions including IE11) in a HTML/SVG javascript-powered widget, only when the widget is hosted on a certain page. I've been having a lot of trouble with bad perf