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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 29 Aug 2019
      • Report Tweet
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      Alex Russell Retweeted Alex Russell

      Lighthouse != Lighthouse The specific hardware and network *matter* https://www.webpagetest.org/easy  is your friend (and mine!)https://twitter.com/slightlylate/status/1167146404755566592 …

      Alex Russell added,

      Alex Russell @slightlylate
      Replying to @slightlylate @mjackson @patmeenan
      But the difference between the LH reports from http://web.dev  and http://webpagetest.org/easy  should give you a sense for how important it is to be running your tests on the real HW you're trying to optimize around: …https://lighthouse-dot-webdotdevsite.appspot.com/lh/html?url=https://open.fda.gov/ … vs. https://www.webpagetest.org/lighthouse.php?test=190829_F7_a00e889c76d1c198ec401361ec901904&run=3 … pic.twitter.com/zS364KZyJo
      4 replies 26 retweets 101 likes
    2. Malte Ubl‏Verified account @cramforce 29 Aug 2019
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      Replying to @slightlylate

      This is a bug in lighthouse

      2 replies 0 retweets 4 likes
    3. Paul Lewis‏ @aerotwist 29 Aug 2019
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      Replying to @cramforce @slightlylate

      Surely, it's less Lighthouse != Lighthouse and more synthetic throttling != real-world constraints. That Lighthouse runs in both contexts is a feature, but perhaps the key is for it to surface that synthetic results are indicative only?

      3 replies 0 retweets 9 likes
    4. Malte Ubl‏Verified account @cramforce 29 Aug 2019
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      Replying to @aerotwist @slightlylate

      If a score of 100 doesn't mean it is good, then that is a product issue. This would be possible to fix. Besides improving throttling, LH could run on real hardware. The latter is basically the way to buy a solution with money.

      1 reply 0 retweets 1 like
      Alex Russell‏ @slightlylate 29 Aug 2019
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      Replying to @cramforce @aerotwist

      To product quality, yes, I'm currently in the middle of writing an email suggesting much, much more conservative scoring. On HW, I've recommended as much for many years. The ~25 MotoG4's on WPT are there today because we (Chrome) bought them and @patmeenan generously runs them.

      1:45 PM - 29 Aug 2019
      • 4 Likes
      • Michael Hood Wolfram ⪡JS-- HTML++ CSS++⪢ Kriesing Andy Davies MICHAEL JACKSON
      2 replies 0 retweets 4 likes
        1. New conversation
        2. Paul Lewis‏ @aerotwist 29 Aug 2019
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          Replying to @slightlylate @cramforce @patmeenan

          Right, but what do you do with -- say -- Lighthouse as standalone, in DevTools, or as part of http://web.dev ? Adjusting scores makes some sense, but ultimately devs will need to run it on representative devices to get representative scores.

          1 reply 0 retweets 1 like
        3. Alex Russell‏ @slightlylate 29 Aug 2019
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          Replying to @aerotwist @cramforce @patmeenan

          It has been...challenging...for me to get folks to center performance claims and goals in the context of a specific and reproducible device/network config. I don't think enough engineers trace sites or work with partners.

          2 replies 0 retweets 9 likes
        4. 5 more replies
        1. David Brunelle‏ @davidbrunelle 29 Aug 2019
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          Replying to @slightlylate @cramforce and

          As a user, it's kind of tough to understand what 0 or 100 even mean. If we recognize that products have different goals/ constraints - then the scoring becomes even more subjective.

          0 replies 0 retweets 1 like
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