Re: [csswg-drafts] [css-selectors] `:has()` and performance (#3345)

I'm not an implementer so I don't know how valuable my comments on this should be considered, but I don't think that it is evaluation of the selector that is particularly hard, but rather the fact that it changes the subject and what tests need to be run on which things and when are different and don't fit neatly into existing strategies for avoiding a ton of extra work. That said, I do think there are probably limitations in what you could write and new optimizations that could strike a doable balance.

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Received on Monday, 26 November 2018 04:50:46 UTC