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slightlylate's profile
Alex Russell
Alex Russell
Alex Russell
@slightlylate

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Alex Russell

@slightlylate

Chrome Project 🐡 & Web Standards TL; Blink API OWNER Named PWAs w/ @phae; probably making her ☕ DMs open. Tweets my own; press@google.com for official comms.

San Francisco, The Internet
infrequently.org
Joined December 2010

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    1. Bruce Lawson. At home.‏ @brucel 28 Jun 2017
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      @slightlylate @andreasbovens @smfr Are there any specific CSS combinators etc that are particularly bad for performance in yr engines?

      3 replies 0 retweets 2 likes
    2. Alex Russell‏ @slightlylate 28 Jun 2017
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      Replying to @brucel @andreasbovens @smfr

      Is there a test case you're looking at that's slow?

      1 reply 0 retweets 1 like
    3. Bruce Lawson. At home.‏ @brucel 28 Jun 2017
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      Replying to @slightlylate @andreasbovens @smfr

      no. just a convo w @WixEng chums - they have a website-builder, & we wondered if there are specific types of CSS to avoid that are esp slow

      2 replies 0 retweets 0 likes
    4. Bruce Lawson. At home.‏ @brucel 28 Jun 2017
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      Replying to @brucel @slightlylate and

      there are a few articles from about CSS perf but they're quite old & engines change & optimise all the time so wondered if any new intel.

      3 replies 0 retweets 0 likes
    5. Robert Daly‏ @robert_daly 28 Jun 2017
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      Replying to @brucel @slightlylate and

      Pretty sure @jaffathecake and others have said that CSS perf is at a stage now you can't negatively impact it.

      1 reply 0 retweets 0 likes
    6. Jake Archibald‏ @jaffathecake 28 Jun 2017
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      Replying to @robert_daly @brucel and

      I don't know if I said that, but tools-not-rules definitely applies here

      2 replies 0 retweets 1 like
    7. Bruce Lawson. At home.‏ @brucel 28 Jun 2017
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      Replying to @jaffathecake @robert_daly and

      indeed. but we can't automatically measure the perf of 100 million Wix-generated sites, so if there any rules at all, we can make better CSS

      1 reply 0 retweets 0 likes
    8. Bruce Lawson. At home.‏ @brucel 28 Jun 2017
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      Replying to @brucel @jaffathecake and

      (of course, there are many other optimisations to be done, too. This is known.)

      1 reply 0 retweets 0 likes
    9. Alex Russell‏ @slightlylate 28 Jun 2017
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      Replying to @brucel @jaffathecake and

      The historical slow paths were related to nth-* and sibling selectors, but not up on current state of the style engine.

      2 replies 0 retweets 1 like
      Alex Russell‏ @slightlylate 28 Jun 2017
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      Replying to @slightlylate @brucel and

      That said, again, I'd be looking first at script and fonts. Fonts in particular! So many foot-guns there.

      9:30 AM - 28 Jun 2017
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        1. Alex Russell‏ @slightlylate 28 Jun 2017
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          Replying to @slightlylate @brucel and

          Anyplace you can automate inserting a font-display rule will be incredible: https://blog.chromium.org/2017/06/chrome-60-beta-paint-timing-api-css.html?m=1 …

          0 replies 0 retweets 1 like
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