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cmuratori's profile
Casey Muratori
Casey Muratori
Casey Muratori
@cmuratori

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Casey Muratori

@cmuratori

I'm worried that the baby thinks people can't change.

Seattle
caseymuratori.com
Joined March 2009

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    1. Casey Muratori‏ @cmuratori 16 Jul 2018

      Me: Everyone's web site is way slower than it should be. Web: That's because they have to scale! Me: But it seems like things still go down under load. Web: ... Me: Amazon runs AWS, and _their_ site didn't even stay up! Web: Oooh look! Someone released a new JavaScript framework!

      6 replies 43 retweets 225 likes
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    4. jordan orelli‏ @jordanorelli 16 Jul 2018

      what makes you think that? that would require that every application server has a copy of the entire database at all times. that's contradicted by this description of their architecture: https://nickcraver.com/blog/2016/02/17/stack-overflow-the-architecture-2016-edition/ …

      0 replies 0 retweets 1 like
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    6. jordan orelli‏ @jordanorelli 16 Jul 2018

      that's a meaningless statement, since the topic at hand is "why are websites slow" and the answer is universally "data storage and retrieval is challenging", and those things don't happen at the application layer.

      0 replies 0 retweets 1 like
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    8. jordan orelli‏ @jordanorelli 16 Jul 2018
      Replying to @Jonathan_Blow @JackMott42 @cmuratori

      unless the data is changing on every request, that sounds like a caching problem, but that's a bit beyond the scope of a twitter thread. there's like a 90% chance the answer is to cache something in redis. DMs are open if this is actually something you want help with.

      1 reply 0 retweets 1 like
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    10. jordan orelli‏ @jordanorelli 16 Jul 2018
      Replying to @Jonathan_Blow @JackMott42 @cmuratori

      my dude you can put all these things on the same machine if you want. The problem is that disks are slow, and the solution is to cache things in memory. That's literally all it is.

      1 reply 0 retweets 1 like
      Casey Muratori‏ @cmuratori 16 Jul 2018
      Replying to @jordanorelli @Jonathan_Blow @JackMott42

      I would love it if it were the case that the primary problem with website speed was data coherency. It isn't. You can trivially hit F12 on most large commercial websites, do a perf and network trace, and see exactly what the problem is: craptons of serially dependent JS libs.

      6:17 PM - 16 Jul 2018
      • 10 Likes
      • bc1n0 Ryan Fleury Trystan Brock Kyle Vermaes babel Jumal Sanchez CJ Voynich42 Seth Archambault
      1 reply 0 retweets 10 likes
        1. New conversation
        2. Casey Muratori‏ @cmuratori 16 Jul 2018
          Replying to @cmuratori @jordanorelli and

          To make matters worse, a lot of times these JS libs _aren't even hash named_, so they have caching effectively turned off, which makes them load everytime. And of course, don't get me started on the craptons of advertising tracking crap that each take ~20ms. It's horrible.

          1 reply 0 retweets 9 likes
        3. Casey Muratori‏ @cmuratori 16 Jul 2018
          Replying to @cmuratori @jordanorelli and

          I wasn't really joking with my original post. Web developers hand wave at a lot of actually hard problems ("it's network latency! it's data coherency! it's scalability") but if you actually profile the sites, none of those things are actually the problem.

          2 replies 0 retweets 10 likes
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