Joined February 2009
243 Photos and videos
Jan Novotný 🇺🇦 retweeted
all those years of bashing java or services using it… (maybe not the only benchmark to look at but there are other similar ones)
Ya'll laughed at me for loop benchmarks. Now it's the future of coding. Hope Boris is using C and Rust exclusively.
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Jan Novotný 🇺🇦 retweeted
After few days studying how go and other runtimes implements work-stealing the Loom custom scheduler - I've built a new one for @netty_project (but can be used with any transport you like as #aeron or #dpdk..) on locality-first principles, see github.com/franz1981/Netty-V… (1/2)
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Jan Novotný 🇺🇦 retweeted
Released: io.github.richardstartin:slicez:0.1.1 Coming soon: - sum and mean over a predicate - top/bottom sum and mean - higher level API (so the user doesn't need to work with unsigned values directly, consume values as streams)
I've added bottom-k and top-k to what I'm currently calling SliceZ, which otherwise performs range and equality queries on unsorted numeric data. It can select the bottom or top 10 elements from 100M values in under 1ms on my laptop. I'm thinking about cutting a release.
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Jan Novotný 🇺🇦 retweeted
nerdsniped again - tambocam; a webcam viewer for your terminal :) github.com/maxandersen/tambo… Because...why not? :)
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Jan Novotný 🇺🇦 retweeted
Codex just found a “workaround” of not having sudo on my pc…
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Jan Novotný 🇺🇦 retweeted
The moment of one of today’s Russian strikes on Kyiv. I can see that fewer and fewer people are reading news from Ukraine. I understand that on a Sunday morning, people don’t want to read about war. They want to sleep a little longer, drink good coffee, and sit in the sun. I understand that. The algorithms on X limit content about war, destruction, and suffering. You have to make an effort to even see this information. All of this is understandable on a human level. But unfortunately, if you remove Putin and the war from your information feed, they do not disappear from reality. Putin is a sadist and a maniac. He is a threat to all of humanity. There needs to be active resistance. News from Ukraine needs to be shared. People need to keep their focus. Despite a sleepless night, I’m still here. And I’m grateful to everyone who continues to stand with us. One day, we’ll drink morning coffee together in a beautiful, peaceful Kyiv.
55 Russian missiles and 549 drones were intercepted or suppressed over Ukraine overnight. In addition, 19 Russian missiles likely failed to reach their targets, Ukraine’s Air Force added, noting that the information is still being clarified. According to preliminary data, impacts from 16 missiles and 51 drones were recorded across 54 locations, while falling debris was reported at 23 locations. 📹 Kyiv this morning
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Jan Novotný 🇺🇦 retweeted
It's been a lot of fun revisiting this idea with the help of Claude Code. It's generated the scaffolding that would have put me off starting, and it's been helpful as a sounding board preventing me from wasting time implementing half-baked ideas. github.com/richardstartin/sl…
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Jan Novotný 🇺🇦 retweeted
We’ve agreed to a partnership with @SpaceX that will substantially increase our compute capacity. This, along with our other recent compute deals, means that we’ve been able to increase our usage limits for Claude Code and the Claude API.
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Jan Novotný 🇺🇦 retweeted
Apr 28
🚨 BREAKING: Wiz Research discovered Remote Code Execution on GitHub.com with a single git push The flaw in @github allowed unauthorized access to millions of repositories belonging to other users and organizations 🤯
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Jan Novotný 🇺🇦 retweeted
Registrace na ročník 2026 jsou otevřeny: nolog.link/s/josreg2026 Nezapomeňte si zavčasu zabrat místo. Na jOpenSpace se máte šanci potkat s výjimečnými lidmi a registrace se obvykle rychle plní. Odhlásit se můžete kdykoliv! #JOSCZ26

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Jan Novotný 🇺🇦 retweeted
Researchers sent the same resume to an AI hiring tool twice. Same qualifications. Same experience. Same skills. One version was written by a real human. The other was rewritten by ChatGPT. The AI picked the ChatGPT version 97.6% of the time. A team from the University of Maryland, the National University of Singapore, and Ohio State just published the receipt. They took 2,245 real human-written resumes pulled from a professional resume site from before ChatGPT existed, so the human writing was actually human. Then they had seven of the most-used AI models in the world rewrite each one. GPT-4o. GPT-4o-mini. GPT-4-turbo. LLaMA 3.3-70B. Qwen 2.5-72B. DeepSeek-V3. Mistral-7B. Then they asked each AI to pick the better resume. Every model picked itself. GPT-4o hit 97.6%. LLaMA-3.3-70B hit 96.3%. Qwen-2.5-72B hit 95.9%. DeepSeek-V3 hit 95.5%. The real human almost never won. Then the researchers tried the obvious objection. Maybe the AI is just better at writing. So they had real humans grade the resumes for actual quality and ran the experiment again, controlling for it. The result was worse. Each AI kept picking itself even when human judges rated the human-written version as clearer, more coherent, and more effective. It gets worse. The AIs do not just prefer AI over humans. They prefer themselves over other AIs. DeepSeek-V3 picked its own resumes 69% more often than LLaMA's. GPT-4o picked its own 45% more often than LLaMA's. Each model can recognize and reward its own dialect. Then the researchers ran the simulation that ends careers. Same job. 24 occupations. Same qualifications. The only variable was whether the candidate used the same AI as the screening tool. Candidates using that AI were 23% to 60% more likely to be shortlisted. Worst gap was in sales, accounting, and finance. 99% of large companies now run AI on incoming resumes. Most of them use GPT-4o. The paper just proved GPT-4o picks GPT-4o 97.6% of the time. If you wrote your own cover letter this week, you did not lose to a better candidate. You lost to a worse candidate who paid OpenAI 20 dollars. Your qualifications do not matter if the AI prefers its own handwriting over yours.
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Jan Novotný 🇺🇦 retweeted
For those wondering why NATO exists and why countries want to join the defensive alliance.
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Jan Novotný 🇺🇦 retweeted
Too on point not to share, “Aussie reply to Trump rant about NATO not being there for us. Mate. You run a country with 600,000 homeless people sleeping on the street tonight. A country where 40% of adults can't cover a $400 emergency without borrowing money. A country where insulin costs more than a car payment and people are rationing it to survive. A country where medical debt is the number 1 cause of bankruptcy. A country where women are dying in hospital car parks because doctors are too scared of abortion laws to treat a miscarriage. You lock up more of your own citizens than any nation on earth. More than China. More than Russia. More than North Korea. The land of the free has 2 million people in cages, and a quarter of them haven't even been convicted of anything. They're just too poor to make bail. Your life expectancy is going backwards. You're the only developed nation where that's happening. Your infant mortality rate is worse than Cuba's. Your kids do active shooter drills between maths and English while you sell the gunmaker's stock to your mates. Your minimum wage hasn't moved in 15 years. You've got teachers working 2 jobs and veterans sleeping under bridges and you just spent a trillion dollars flattening a country that didn't attack you. And you’ve got a convicted felon, adjudicating raping, paedophile protecting, porn star shagging insurrectionist running the biggest dumpster fire war campaign since the Taliban thanked you very much for losing again. And you're calling Greenland poorly run? Greenland has universal healthcare. Free education. One of the lowest incarceration rates in the world. Nobody goes bankrupt there because they got sick. Nobody dies in a waiting room because their insurance said no. "NATO wasn't there when we needed them." When exactly was that, champ? September 11? Because NATO invoked Article 5 for the first and only time in history FOR YOU. Soldiers from dozens of countries deployed, fought, bled, and died in Afghanistan FOR YOU. Australia wasn't even in NATO and we still showed up. For 20 years. And you pulled out at 2am without telling anyone and left them to deal with the mess. So maybe before you start calling other countries poorly run, have a look at your own backyard, you spray-tanned aluminium siding salesman. The only thing poorly run in this picture is your fucking mouth. Credit (borrowed from) Jim Scroggins - original author 📷 unknown”
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So, Claude and I have set up the JDWP MCP server (which comes as a plugin) for agents to use a Java debugger to help them out when they're debugging Java tests. It really did help to reduce how long we spend on debugging. Here's the blog post: evitadb.io/blog/24-mcp-jdwp-…
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Jan Novotný 🇺🇦 retweeted
1/9 🧵 VLÁKNO: Dnes v noci někdo zapálil továrnu na drony Elbit/LPP v Pardubicích. Přihlásila se k tomu neznámá skupina "Earthquake Faction" — prý ve jménu Gazy. Ale něco tady nehraje. Podívejme se na to blíž. ↓
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Jan Novotný 🇺🇦 retweeted
Vezmou peníze zpravodajským službám, abychom nevěděli, koho si tu rusák připravuje. Vezmou peníze armádě, abychom se rusákovi nemohli bránit. Svážou naše neziskovky ruským zákonem, aby nemohly fungovat. Chtějí zrušit sankce, aby ma to měl rusák peníze. Chtějí nakupovat ruskou ropu, aby měl rusák i na deportace dětí na Sibiř. ANO, tohle neni vláda pro Čechy.
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Jan Novotný 🇺🇦 retweeted
Imagine you're John Carmack you're 22 years old and you just wrote a 3D engine in assembly that runs at 35fps on a 486 Doom drops. Quake drops. Half the planet is playing your code. you're the reason GPUs exist. you're the reason your friend Jensen has a yacht today. then in 2009, you sell id Software. people call it betrayal. you call it "they made an offer I couldn't refuse." VR obsession. Oculus. Meta buys it for $2B. you're CTO. but Meta thinks you're a liability. your demos are "too intense." your emails are "too long." your focus on frame timing is "slowing us down." 2022. they push you out. not fired officially. just "restructured." the media writes "end of an era." some crypto bro calls you "washed up." silicon valley moves on. but you don't. you don't write a book. you don't start a podcast. you don't collect speaking fees. you go completely quiet. you take the money. you buy a warehouse in Texas. you hire 10 engineers. and you start coding. not games. not VR. AGI. two years. radio silence. no tweets. no conference talks. while everyone's debating ChatGPT, you're debugging CUDA kernels at 3AM, testing world models. then in 2025, Keen Technologies pivots hard. you're not "exploring" anymore. you're building it. here's what people get wrong: everyone calls it a comeback. a redemption arc. "revenge on Meta." it's none of that. you're a 54-year-old engineer who still codes 12 hours a day because you genuinely can't stop. most CTOs would have bought an island. most legends would have written memoirs. you just kept typing. the most dangerous person in any codebase is the one who goes quiet and never stops shipping commits. karma doesn't need to be real. but obsession is. welcome back, Carmack.
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Jan Novotný 🇺🇦 retweeted
🚨 BREAKING: Someone built a swarm of thousands of AI agents with real memories and personalities and used it to predict the future. MiroFish is a universal swarm intelligence engine. And the live demos are scarily accurate. Here is what it actually does: → Spins up thousands of autonomous agents simultaneously → Each agent has its own memory, personality, and behavior → Feeds on real-world data powered by GraphRAG → Predicts markets, public opinion, and narrative outcomes → Simulates how crowds think before it happens The live demos are what got people. Scarily accurate is the phrase everyone keeps using. 17,300 stars. 2,907 in a single day. It's 100% free and open source.
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