Tomás Mayr (@tmayr) profile picture

Something something JS, something something Web, something something something else

Copenhagen, Denmark
Joined August 2008
Photo by Tomás Mayr (@tmayr)Photo by Tomás Mayr (@tmayr)Photo by Tomás Mayr (@tmayr)Photo by Tomás Mayr (@tmayr)Photo by Tomás Mayr (@tmayr)Photo by Tomás Mayr (@tmayr)Photo by Tomás Mayr (@tmayr)
Building is more fun now if you like chaos.
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People of pi. BIG NEWS. I've sold out. Let me know how you feel about this in the comments below. mariozechner.at/posts/2026-0…
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we do the same thing except we make fun of whoever is #1
Exclusive: Meta employees are “tokenmaxxing” and competing on an internal leaderboard called “Claudeonomics” for status as a token legend. Over a recent 30-day period, total usage on the dashboard topped 60 trillion tokens.
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It feels like everyone at work is DDoSing each other with AI. Everyone's capable of slightly more output now. Not better or worse, just more. Which means more input for everyone else. AI is good for producing. We don't have great workflows yet for consuming.
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Many people assuming I meant job loss anxiety but that's just one presentation. I'm seeing near-manic episodes triggered by watching software shift from scarce to abundant. Compulsive behaviors around agent usage. Dissociative awe at the temporal compression of change. It's not fear necessarily just the cognitive overload from living in an inflection point.
I don't know why this week became the tipping point, but nearly every software engineer I've talked to is experiencing some degree of mental health crisis.
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Unpopular opinion: Unless you’re just prototyping, you should aim to understand as close to 100% of production code generated by LLMs. Yes, all of it. Effective mental models are still important for humans to sustainably maintain and evolve a codebase via prompting alone.
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Here's a bit of coding agent magic fairy dust for the day: Don't tell the agent to do something. Tell the agent to _begin_ doing something. The LLM will, on average, make wiser choices about how much work to bite off.
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A question that lives rent free in my head...
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Tech lead vibes
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People will be like, “generative AI has no practical use case,” but I did just use it to replace every app icon on my home screen with images of Kermit, soooo
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Here is Gojira’s full performance at the Olympics! Totally badass! #Gojira #Paris2024
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if you want to ruin someone’s day just start filling out forms with [object Object]
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Remember: This is only relevant if you want a job at AWS. It has no bearing on your actual ability to ship meaningful software and is purely part of the game they’ve invented to process hundreds of thousands of applications. If you’re shipping stuff, you’re a good developer.
This quoted post is unavailable.
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The perf impact of this is curious. Arguments are very cheap in JS, unlike objects. Using the wrong order will kill the hidden class. A lot of optimizations need to happen to eliminate the object allocation and the property access cost. The function better be hot and inlineable.
Habit: If a function accepts two arguments of the same type, I accept an object. This protects from accidentally passing args in the wrong order.
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"Engineering is more about people than tech"
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SOMEONE LEFT. A FULL PLATE OF COOKIES. AND A GLASS OF MILK. RIGHT BY THE FIREPLACE FOR ME. I AM NOT KIDDING. WHAT A NIGHT
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OS internals books are wild...
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Nov 2022: "Do you really think he's not up to managing a social network?" July 2023: "Surely someone who can figure out how to build spaceships can figure out how to distinguish scrapers from legit users" 🤔
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