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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. Alex Russell‏ @slightlylate 1 Nov 2016
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      Replying to @slightlylate

      ...which means the latency to begin fetching those resources is now much higher in the common case. Of course, you can work around (kinda)

      1 reply 0 retweets 8 likes
    2. Alex Russell‏ @slightlylate 1 Nov 2016
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      Replying to @slightlylate

      A bigger toolchain, <link rel="prefetch">, H/2 push, etc. You can get some of it back, but not entirely.

      1 reply 0 retweets 8 likes
    3. Alex Russell‏ @slightlylate 1 Nov 2016
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      But it's not just parsers! When you bake, e.g., CSS & templates into script, those things live in the heap. We can't drop them (usually).

      2 replies 6 retweets 16 likes
    4. Alex Russell‏ @slightlylate 1 Nov 2016
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      So memory footprint goes up. The code that's generated is only a part of it; the source code stays around in most impls today -- often large

      2 replies 1 retweet 9 likes
    5. Alex Russell‏ @slightlylate 1 Nov 2016
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      The larger issue, of course, is script eval is single-threaded. We can't construct (e.g.) DOM off-thread. And script ~10x slower on phones.

      2 replies 2 retweets 13 likes
    6. Alex Russell‏ @slightlylate 1 Nov 2016
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      Not all phones, mind. Developers with ~$700 iPhones & Pixels are living in a different world to most folks.

      2 replies 5 retweets 19 likes
    7. Alex Russell‏ @slightlylate 1 Nov 2016
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      The most obvious impact is interactivity blocked on script eval. We can't load/run main-thread JS w/o halting input processing.

      1 reply 0 retweets 11 likes
    8. Alex Russell‏ @slightlylate 1 Nov 2016
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      But what I'm seeing in traces is how script-based abstraction & dependence is dragging folks away from the impacts of these choices.

      1 reply 0 retweets 2 likes
    9. Alex Russell‏ @slightlylate 1 Nov 2016
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      Alex Russell Retweeted Alex Russell

      Old news that webdevs who don't know DOM instinctively pull in libs when not needed. We've tech'd up from there:https://twitter.com/slightlylate/status/790991610100101120 …

      Alex Russell added,

      Alex Russell @slightlylate
      Just traced a site that included an ad. The ad included a full copy of a popular framework, to the tune of 150K (~50K gzipped). "Creative".
      1 reply 2 retweets 5 likes
    10. Alex Russell‏ @slightlylate 1 Nov 2016
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      So when you see folks saying #usetheplatform, this is what we're talking about. We're not succeeding on mobile w/ current approaches.

      1 reply 4 retweets 8 likes
      Alex Russell‏ @slightlylate 1 Nov 2016
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      Could go on-and-on about the script-first thing: resource fetch priorities, browser scheduling and idle-time control, input processing, etc.

      6:24 PM - 1 Nov 2016
      • 3 Likes
      • Sarah Drasner Baldur Bjarnason @baldur@toot.cafe Sérgio Lopes
      1 reply 0 retweets 3 likes
        1. New conversation
        2. Alex Russell‏ @slightlylate 1 Nov 2016
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          The most important thing to keep in mind is that when you put your app in script, you are now entirely responsible. Browser can't help you.

          1 reply 19 retweets 31 likes
        3. Alex Russell‏ @slightlylate 1 Nov 2016
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          Maybe you want/need that control. Congrats, you have it! But keep in mind what you're giving up and will need to work to rebuild.

          3 replies 2 retweets 13 likes
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