@slightlylate If I use six instances of a custom element with shadow dom, it has to re-parse the stylesheet each time?pic.twitter.com/4U7LTvto59
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Here’s a simple example: https://codepen.io/anon/pen/jGYdJe . Whenever I profile I see Parse Stylesheet run for each instance
Oooohhhh...@import. Need to dig into that to recall what we do there.
On 6x slowdown without the style tag, connectedCallback takes ~3ms — with the style tag it takes ~90ms
Digging into a trace with now. Thanks for the repro.
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