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danluu's profile
Dan Luu
Dan Luu
Dan Luu
@danluu

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Dan Luu

@danluu

https://patreon.com/danluu 

danluu.com
Joined December 2008

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    1. Dan Luu‏ @danluu May 15
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      The more I looked into this, the more impressed I was with Amazon engineering. But AFAICT this never translated into any kind of reputational change. I don't think this is unique to Amazon either. When I compare general reputation to what I can observe, they seem uncorrelated.

      23 replies 12 retweets 236 likes
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    2. Dan Luu‏ @danluu May 15
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      BTW, I don't mean this thread as an attack on MS or Google. It's more that if I could take a sabbatical from my job and intern somewhere to learn from them, Amazon would be at the top of my list and I don't think many others would put any company in my top 3 in their top 50.

      9 replies 5 retweets 145 likes
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    3. Dan Luu‏ @danluu May 22
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      I've also never understood Widows snobbery. StackOverflow was running on 11 IIS boxes + 4 MySQL boxes in 2016, could tolerate failing down to 1 IIS box. Meanwhile, some trendy SV companies were serving multiple orders of magnitude less traffic at multiple OoM greater cost.pic.twitter.com/iBNu8yQokW

      "A couple years ago a venture capitalist friend told me about a new startup he was involved with. It sounded promising. But the next time I talked to him, he said they'd decided to build their software on Windows NT, and had just hired a very experienced NT developer to be their chief technical officer. When I heard this, I thought, these guys are doomed. One, the CTO couldn't be a first rate hacker, because to become an eminent NT developer he would have had to use NT voluntarily, multiple times, and I couldn't imagine a great hacker doing that; and two, even if he was good, he'd have a hard time hiring anyone good to work for him if the project had to be built on NT." -- Paul Graham
      4 replies 7 retweets 50 likes
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    4. Dan Luu‏ @danluu May 22
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      PG also says: Python programmers are smarter than Java programers, good hackers prefer Python. Odd, Google was built on Java & C++ (w/some Python). But if you were on the MS stack you wouldn't have to choose between the perf & IDE support of Java and Python expressiveness.pic.twitter.com/i0f0aMr4oy

      "When you decide what infrastructure to use for a project, you're not just making a technical decision. You're also making a social decision, and this may be the more important of the two. For example, if your company wants to write some software, it might seem a prudent choice to write it in Java. But when you choose a language, you're also choosing a community. The programmers you'll be able to hire to work on a Java project won't be as smart as the ones you could get to work on a project written in Python. And the quality of your hackers probably matters more than the language you choose. Though, frankly, the fact that good hackers prefer Python to Java should tell you something about the relative merits of those languages."
      3 replies 3 retweets 22 likes
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    5. Dan Luu‏ @danluu May 22
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      Until Kotlin, there wasn't a mainstream non-MS language that had anything close to the same combination of: * Performance * Ease of use / ease of onboarding new devs * IDE suport * General expressiveness (arguably Go, but I would disagree on expressiveness & IDE support)

      3 replies 8 retweets 33 likes
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    6. Dan Luu‏ @danluu May 22
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      Why care about performance? While trendy $1B to $70B SV companies were devoting a ton of time, money, & effort to scaling up a v. low performance stack, SO was humming along with relatively little effort devoted to scaling because they started with a moderate performance stack.

      3 replies 7 retweets 50 likes
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    7. Indy Singh‏ @indy_singh_uk May 24
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      Replying to @danluu

      I'm not sure about "with relatively little effort devoted" @Nick_Craver & @marcgravell are always trying to squeeze more performance out of the stack.

      1 reply 0 retweets 2 likes
    8. Nick Craver‏Verified account @Nick_Craver May 24
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      Replying to @indy_singh_uk @danluu @marcgravell

      To be fair - we do spikes, but just not ignoring it and dedicating some conscious time over the last decade is the main thing (not constant love). That's why MiniProfiler exists: gives us a number in the corner of every page load: put it in every dev's face. Make it a priority.

      1 reply 2 retweets 13 likes
    9. Marc Gravell‏ @marcgravell May 24
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      Replying to @Nick_Craver @indy_singh_uk @danluu

      Exactly this. We don't sit there thinking "perf perf perf" as our day job, but we a: monitor load on an ongoing basis, and b: occasionally investigate what the big pain points are, and solve those. We only solve actual problems.

      1 reply 1 retweet 20 likes
    10. Dan Luu‏ @danluu May 24
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      Replying to @marcgravell @Nick_Craver @indy_singh_uk

      Indy, I'm not saying the SO devs don't work on performance. They clearly do. But, due to headcount in 2013/2016, it was impossible for them to have spent 1/10th the effort on perf as some trendy SV companies (that had 1/100th the traffic), even if they were full time on perf.

      2 replies 0 retweets 3 likes
      Dan Luu‏ @danluu May 24
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      Replying to @danluu @marcgravell and

      The thing that's analogous to the first half of the thread is, if you ask who has the best engineering (ex GOOG), people will name some >$1B "startups" that have architectures with serious data loss/corruption problems that are low reliability, low perf, & high operational burden

      4:39 PM - 24 May 2020
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      • Justin Nuß Indy Singh
      1 reply 0 retweets 2 likes
        1. New conversation
        2. Dan Luu‏ @danluu May 24
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          Replying to @danluu @marcgravell and

          The most frequent pick I hear had 2 9s of uptime, an architecture that scaled out to handle 0.5 QPS per VM, 8 figures of annual AWS spend, and rampant data loss & corruption. I find it odd that architectures like that are venerated while simple architectures that work are not.

          1 reply 2 retweets 16 likes
        3. Justin Blank‏ @hyperpape May 24
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          Replying to @danluu

          Stretch goal on your Patreon should be “Dan sends you a Twitter DM with the name of the 2 9s unicorn.” 😂

          0 replies 0 retweets 2 likes
        4. End of conversation

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