As I mentioned in the talk, Sizzle is right-to-left but makes an exception for when an ID is the first item in the selector - it uses that as the root context, speeding things up.
--John On Wed, Sep 16, 2009 at 6:34 PM, Jörn Zaefferer < joern.zaeffe...@googlemail.com> wrote: > > Sizzle also uses right-to-left, though I dunno if it makes exceptions > when the selector has an #id. Going right-to-left is definitely much > more efficient for selectors ala "div div". > > Jörn > > On Thu, Sep 17, 2009 at 12:22 AM, Michael Geary <m...@mg.to> wrote: > > Steve Souders' talk? He mentioned the same thing at Google I/O, and he > was > > talking about how CSS engines in browsers - or at least the one in > Firefox - > > process selectors. > > > > He wasn't talking about how jQuery (or more specifically Sizzle) > processes > > selectors. > > > > If you're curious to know why CSS engines work right-to-left - or which > ones > > work this way - the CSS mailing list would be a good place to ask. I'm > > curious about it too! > > > > John, does Sizzle work left-to-right or right-to-left? > > > > -Mike > > > > On Wed, Sep 16, 2009 at 1:38 PM, samer <samerzia...@gmail.com> wrote: > >> > >> Hi, > >> > >> I was reading over the slides at the conf, and I wanted to ask about > >> the right to left for selectors. How is it more efficient to get all > >> divs and then find the ID as opposed to get the ID and then get it's > >> divs? > >> > >> scenario: > >> > >> #id div > >> > >> Thanks > > > > > > > > > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "jQuery Development" group. To post to this group, send email to jquery-dev@googlegroups.com To unsubscribe from this group, send email to jquery-dev+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/jquery-dev?hl=en -~----------~----~----~----~------~----~------~--~---
