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Re: Threshold for fast profile?

From: Brian Kardell <bkardell@gmail.com>
Date: Fri, 13 Mar 2015 15:57:00 -0400
Message-ID: <CADC=+jcgDS3Ds2g-otSbETaXmHQr8uksGX1XVkTZS4Z4y3Tr5g@mail.gmail.com>
To: Zach Saucier <zachsaucier@gmail.com>
Cc: "www-style@w3.org" <www-style@w3.org>
On Fri, Mar 13, 2015 at 3:07 PM, Zach Saucier <zachsaucier@gmail.com> wrote:
> The CSS Selector 4 doc specifies :has() as the only selector to not be a
> part of the fast profile. Currently, at what threshold is this determined
> and how is this tested?

Zach, see https://lists.w3.org/Archives/Public/www-style/2015Mar/0066.html
for a discussion on this, specifically david's

" dbaron: What makes the selector slow is what needs to be done to
          handle a dynamic change. If you do a DOM mutation here,
          where do you need to reevaluate and can you reasonably
          track that.

The minutes are much shorter than what he said which I think was spot
on and someone (david or boris z would be my pref) should do a post on
this as I think it will inevitably keep coming up.

Brian Kardell :: @briankardell :: hitchjs.com
Received on Friday, 13 March 2015 19:57:26 UTC

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