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wycats's profile
Yehuda Katz 🥨
Yehuda Katz 🥨
Yehuda Katz  🥨
Verified account
@wycats

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Yehuda Katz  🥨Verified account

@wycats

Tilde Co-Founder, OSS enthusiast and world traveler.

Portland, OR
yehudakatz.com
Joined August 2007

Tweets

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    1. old, yet online‏ @lawnsea 3 Nov 2016
      Replying to @wycats

      that's an interesting reading of that result, which is about code that then has to be parsed anyway @samccone @tbreisacher @tdreyno

      1 reply 0 retweets 1 like
    2. old, yet online‏ @lawnsea 3 Nov 2016
      Replying to @lawnsea @wycats

      claiming that JS parse costs are non-trivial is surprising. can u give a better justification? @samccone @tbreisacher @tdreyno

      2 replies 0 retweets 0 likes
    3. Yehuda Katz  🥨‏Verified account @wycats 3 Nov 2016
      Replying to @lawnsea @samccone and

      people misunderstood the optimizejs result. lazy parse is bad for code that'll be evalled anyway 1/

      1 reply 0 retweets 3 likes
    4. Yehuda Katz  🥨‏Verified account @wycats 3 Nov 2016
      Replying to @wycats @lawnsea and

      but it is very effective on code that *won't be* which is common in real applications 2/

      1 reply 0 retweets 3 likes
    5. Yehuda Katz  🥨‏Verified account @wycats 3 Nov 2016
      Replying to @wycats @lawnsea and

      because lazy parse can be effective at unused code 3/

      2 replies 0 retweets 2 likes
    6. old, yet online‏ @lawnsea 3 Nov 2016
      Replying to @wycats

      ok, i think we agree on this. but for js on the critical path, @samccone is right, yeah? @tbreisacher @tdreyno

      3 replies 0 retweets 2 likes
    7. Yehuda Katz  🥨‏Verified account @wycats 3 Nov 2016
      Replying to @lawnsea @samccone and

      JS off the critical path is super-common, and most likely target for pruning.

      1 reply 0 retweets 0 likes
    8. old, yet online‏ @lawnsea 3 Nov 2016
      Replying to @wycats

      sure. @samccone tweets *a lot* about code *on* the critical path. in that case, parse time is real, yeah? @tbreisacher @tdreyno

      1 reply 0 retweets 1 like
    9. Yehuda Katz  🥨‏Verified account @wycats 3 Nov 2016
      Replying to @lawnsea @samccone and

      yes, but the conclusion *literally everyone* draws from the chart is to go measure bytes over wire

      1 reply 0 retweets 1 like
    10. Yehuda Katz  🥨‏Verified account @wycats 3 Nov 2016
      Replying to @wycats @lawnsea and

      and I think we're agreeing that bytes-over-wire is much less important than bytes-in-critical-path

      2 replies 0 retweets 3 likes
      Yehuda Katz  🥨‏Verified account @wycats 3 Nov 2016
      Replying to @wycats @lawnsea and

      you may, for example, want to include some extra bytes so subsequent interactions don't trigger 1/

      9:43 PM - 3 Nov 2016
      • 1 Like
      • brent
      1 reply 0 retweets 1 like
        1. New conversation
        2. Yehuda Katz  🥨‏Verified account @wycats 3 Nov 2016
          Replying to @wycats @lawnsea and

          network fetches. those bytes will have a net positive impact on the early user experience 2/

          1 reply 0 retweets 2 likes
        3. Yehuda Katz  🥨‏Verified account @wycats 3 Nov 2016
          Replying to @wycats @lawnsea and

          but the "bytes-over-wire" metric will tell you to force another XHR. 3/3

          1 reply 0 retweets 2 likes
        4. old, yet online‏ @lawnsea 3 Nov 2016
          Replying to @wycats

          in my experience, this is a second optimization. cutting critical path bytes makes a bigger diff. @samccone @tbreisacher @tdreyno

          1 reply 0 retweets 0 likes
        5. Yehuda Katz  🥨‏Verified account @wycats 3 Nov 2016
          Replying to @lawnsea @samccone and

          I have seen even critical-path bytes (which nobody really measures) really mislead people.

          2 replies 0 retweets 0 likes
        6. Yehuda Katz  🥨‏Verified account @wycats 3 Nov 2016
          Replying to @wycats @lawnsea and

          more directly, if critical-path-bytes was the metric, why is everyone measuring the size of libs?

          1 reply 0 retweets 1 like
        7. old, yet online‏ @lawnsea 3 Nov 2016
          Replying to @wycats

          because they're often on the critical path? @samccone @tbreisacher @tdreyno

          2 replies 0 retweets 1 like
        8. Yehuda Katz  🥨‏Verified account @wycats 3 Nov 2016
          Replying to @lawnsea @samccone and

          part of what bothers me is that I've been part of a team for the last 18 months whose entire job 1/

          1 reply 0 retweets 1 like
        9. Yehuda Katz  🥨‏Verified account @wycats 3 Nov 2016
          Replying to @wycats @lawnsea and

          was to reduce end-to-end time of time-to-interactivity. chasing "bytes-over-wire" was probably 2/

          2 replies 0 retweets 1 like
        10. 4 more replies

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