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Tuomas Artman
x.com
When @traverspw told me he wanted to use Turbopuffer for an index scan for delta sync I was sure I misheard. A very novel use of Turbopuffer right here:
turbopuffer delta scan
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least often elsewhere. Posts are matched on those words alone —
nothing here is a summary of this one.
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18 September
Founder of Farnam Street (fs.blog) and host of The Knowledge Project podcast. Writes and curates on decision-making, mental models and rational thinking.
This @Neko scan will change healthcare. It feels like a spa and takes an hour from the time you walk in to get a scan, bloodwork, strength, body composition, and a consultation with a dr about your results. I went last year and they’ve made incredible progress on the technology already. The first New York City location opens next week. Related
17 September
CEO of Positive Sum and founder of Colossus. Hosts Invest Like the Best, interviewing investors and business leaders; the guests do most of the talking there.
Neko is opening in NYC They’ve created a truly remarkable experience at crazy low cost compared to other options. A 30 min full scan AND report—bloods, skin, heart, strength, body composition. I need to fix a few small things, and will b/c of Neko Future is here! Related
Former options market maker who writes Moontower, a newsletter on trading, volatility, decision-making and how to think about risk outside markets too.
Solution Put max value is strike Call max value is stock price Straddle is c + p Logic for delta: Quoting @KrisAbdelmessih Smart followers. Would love to see the same poll run on some other timelines. Related
Writes The Pragmatic Engineer, the software-engineering newsletter, and wrote The Software Engineer's Guidebook. Formerly an engineering manager at Uber, and at Microsoft/Skype and Skyscanner before that.
The puzzle of why the @turbopuffer X account follows these 5 people, and no one else, is either a deliberately hard puzzle or an insider joke. If anyone cracked it, let me know: Related
Writes The Pragmatic Engineer, the software-engineering newsletter, and wrote The Software Engineer's Guidebook. Formerly an engineering manager at Uber, and at Microsoft/Skype and Skyscanner before that.
Their words
@turbopuffer – vector and full-text search engine built on object storage. It’s fast, cheap, and extremely scalable. https://t.co/w9y67Gs8ab
Show the whole quote
x.com
16 September
Former options market maker who writes Moontower, a newsletter on trading, volatility, decision-making and how to think about risk outside markets too.
Interest rates are 0, no dividends, stock is at $100. Assume 1 year to expiration. What is the maximum fair-value of the $100-strike straddle? If the straddle trades at its max value, what is the straddle’s delta? interest rates Related
Author of Shape Up; formerly head of strategy at Basecamp, where he worked on product design for seventeen years; now runs Felt Presence.
Here's one of the many little ways that AI is changing expectations about UI. I'm building this thing I want for teams I manage to more clearly define review points. (A bit like Shopify's phase transitions in their GSD system). I have a handful of tasks that should be checked in a review. It used to be normal practice that any list in a UI needs a title. Eg "List" or "Untitled" etc. But this was always a drag, right? Naming a list just to have a group of things is extra work. But without a name it's hard to scan and find and all lists look the same. Now AI can generate titles for anything. Li… Related
11 September
Philosophy professor at UC Berkeley and creator of pandoc, the universal document converter, and of the CommonMark markdown specification.
2 September
Writes The Pragmatic Engineer, the software-engineering newsletter, and wrote The Software Engineer's Guidebook. Formerly an engineering manager at Uber, and at Microsoft/Skype and Skyscanner before that.
Excited to share the amazing companies sponsoring The Pragmatic Engineer Podcast the fall: turbopuffer is our presenting sponsor. How the company started is epic: founder Simon Eskildsen told Cursor he can reduce their database bill by 95%... and he did (!!) turbopuffer.com/pragmatic (cont'd) Related
26 August
AI research engineer working on large language models. He writes the Ahead of AI newsletter and is the author of Build a Large Language Model (From Scratch).
Now we know: The popular Ox Alpha LLM was GLM-5.3-Flash... Compared to GLM-5.2, this new GLM-5.3-Flash model uses: - a Kimi Linear-style 3:1 (super*) hybrid attention pattern with 34 Kimi Delta Attention layers (KDA) and 11 Multi-heat Latent Attention (MLA) / DeepSeek Sparse Attention (DSA) layers; - a scaled-down GLM-5.2-style sparse MoE backbone, going from 744B-A40B to 320B-A18B; - a DeepSeek V4-style mHC residual path with four parallel streams; - plus a native vision encoder (not shown). * "Super hybrid" because both KDA and MLA/DSA are "efficient" components. E.g., Kimi only uses KDA +… Quoting @Zai_org Introducing GLM-5.3-Flash - Leading capabilities at a highly competitive price - Natively multimodal with a 1M-token context window - A 320B-A18B model released under the MIT License - Previously previewed as Ox Alpha, running entirely on Chinese AI chips Blog: https://t.co/tzOmB7gdZP Available now… LLMs Related
Programmer; makes Handmade Hero and teaches Performance-Aware Programming, and argues loudly about how software got slow.
Their words
What is the underlying hardware capable of doing at its theoretical peak? And then you measure the delta between that theoretical maximum and what you have achieved.
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youtube.com
10 August
Swedish programmer with degrees in engineering and psychology, author of Your Code as a Crime Scene and founder of CodeScene.
I made a conscious effort to unplug during my vacation. Coming back, I noticed the lovely new Substack feature: Scan for AI text. Coincidentally, I had updated the About section for my Substack a while back with some notes on what my blog is *not*: "## What this isn’t Content creation isn’t my job. I write these articles because I a) love to write, and b) care deeply about our profession. It’s a fun hobby, not a job. Consequently, I don’t feel any pressure to publish on a schedule. I’d rather publish less and maintain a higher quality bar. So far, that has worked out to roughly one article pe… Related
3 August
Physician focused on longevity; wrote Outlive and hosts The Drive.
23 July
Product discovery coach; wrote Continuous Discovery Habits and writes Product Talk.
22 July
Security engineer; founder of Matasano Security and Latacora.
OpenAI
Their words
I genuinely believe that if you took an open weights model from 2025 and built a pentest harness for it, it could do this kind of sandbox escape and scan/hack in most networks. This is only surprising because you assume OpenAI has sounder sandboxes.
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@tqbf on X x.com
21 July
Writes The Pragmatic Engineer, the software-engineering newsletter, and wrote The Software Engineer's Guidebook. Formerly an engineering manager at Uber, and at Microsoft/Skype and Skyscanner before that.
28 April
Programmer and writer on computer architecture, performance, and software reliability. He has worked on CPU design at Centaur Technology and on software at Google and Microsoft, and writes long-form technical essays at danluu.com.
Can someone at OpenAI help me with an account issue? I'm doing non-security testing and constantly getting flagged for doing "cybersecurity" work. I did the approval / ID scan on my personal account, but my work account is in an infinite loop and I can't use codex/GPT at work. OpenAI Related
10 March
Software engineer and educator; creator of Testing Library and of the EpicWeb.dev and EpicReact.dev courses.
Their words
delta (a better git diff)
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kentcdodds.com
18 December 2025
Founding member of OpenAI and former director of AI at Tesla; creator of nanoGPT and the term "vibe coding".
Their words
Use apps like BobbyApproved and Ivy to scan the bar codes and get a lot of information about all ingredients and a score (I like and use both).
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karpathy.bearblog.dev
Their words
Use apps like BobbyApproved and Ivy to scan the bar codes and get a lot of information about all ingredients and a score (I like and use both).
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karpathy.bearblog.dev
17 May 2025
Mathematician at UCLA, working mainly in harmonic analysis and partial differential equations. Writes What's new, a long-running blog on their research, open problems and expository notes.
A third video in my occasional series on #Lean4 formalization workflows, this time focusing on how relying extensively on #GitHubCopilot fares against standard "epsilon delta" type problems in analysis. youtube.com
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18 March 2024
Co-founder and CEO of OpenAI; previously president of Y Combinator.
OpenAI
Their words
I expect that the delta between 5 and 4 will be the same as between 4 and 3 and I think it is our job to live a few years in the future and remember that the tools we have now are going to kind of suck looking backwards at them and that’s how we make sure the future is better.
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youtube.com
2 August 2023
Designer and developer; created the Solarized colour scheme and the Kinkless task system that became OmniFocus.
Nothing matches. Show everything
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