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Techieddie👨🏼💻
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Techieddie👨🏼💻 retweeté
A monetary miracle has to happen between now and Saturday
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Techieddie👨🏼💻 retweeté
Jane Street made ~$40B in 2025 with 3,500 employees, a ~2x from the year before.
At ~65-70% profit margin, that's $8M profit / employee, the highest for a 1000+ ppl company. High-frequency trading continues to be the most efficient money making engine.
I want to share an old story about my Jane Street interview in 2014. Jane Street was known for hiring a lot of math, physics and CS olympiad winners from top universities and putting them through many rounds - including, for trading roles, a gauntlet of mental math. It was my 6th interview and my final round and I recall being asked "What is the next day after today in DD/MM/YYYY where all the digits are unique?" They'd toy with you and say "You can use a pencil and paper, if you want" but you knew that was an instant no. Painstakingly and as quickly as I could, I came to an answer. "How confident are you that this is correct on a 0-1 probability scale?" the interviewer said. "0.95", I blurted out, not fully knowing how to answer that. "Are you sure?" After thinking harder for a few more seconds, I realized I could've flipped the digits around to get a closer date. I gave the interviewer my answer. It was correct. "0.95 huh?" he chuckled. That's when I knew I failed.
Note: fwiw, other companies that come close in efficiency are
- Tether ($90M+ profit/emp)
- Hyperliquid ($80M+ profit/emp)
and on revenue:
- Valve ($50M/emp)
- OnlyFans ($37M/emp)
- Craigslist ($14M/emp)
- Anthropic ($12M/emp, run rate)
- OpenAI ($8M/emp, run rate)
For comparison, Nvidia is very efficient at scale and is $4.4M/emp.
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@_theogod Comgrats man, but see if you can even your splits, try maintaining 5:35 from beginning to end, might be difficult to do but tempo training would help, cause making up for the slow start by running faster in the last split can be too draining. See if you can hold 5:35 till the end
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@Onakerireme Thought same immediately I saw the post, went viral cause marathon buzzword has been trending since Sunday too...
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Techieddie👨🏼💻 retweeté
Techieddie👨🏼💻 retweeté
The saying "It's a marathon, not a sprint" no longer has any meaning. The marathon is a sprint, time for a longer event.
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Techieddie👨🏼💻 retweeté
Nike: “our fastest shoe is the Alphafly 3”
Adidas: “our fastest shoes is the ‘adizero adios pro evo 3’, it’s not available. It will never be. Some shoes on our site are named similar. Actually a lot are. None are available in the US. No we can’t tell you the difference.”
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Add a Hydration vest and we might just see sub 1:50 😂😂😂😂😂
HywelTowel@hyweltowel
Imagine that Sawe had worn compression socks. 1.56 maybe. Add one of those cooling headbands, a nasal strip, and one arm cooler. Maybe 1.55 next time.
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Techieddie👨🏼💻 retweeté
Techieddie👨🏼💻 retweeté
Nice one 🤣🤣🤣
Boston Marathon@bostonmarathon
Congrats to the FASTEST BOSTON QUALIFIERS from the 2026 TCS @LondonMarathon 🔥🙌 Sabastian Sawę — 1:59:30 (WR) #BQ by 55 minutes, 30 seconds Tigst Assefa — 2:15:41 (WR) #BQ by 1 hour, 9 minutes, 19 seconds CONGRATS to all finishers‼️👏 📸 Bob Martin for London Marathon Events
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Techieddie👨🏼💻 retweeté
Techieddie👨🏼💻 retweeté
the concept of vinny mauri wanting to fall back in love with running and then spending 3 straight months on a planet fitness treadmill. I don't think I mean the same thing when I say I love running.
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Techieddie👨🏼💻 retweeté
Techieddie👨🏼💻 retweeté
How did Sabastian Sawe fuel during his 1:59:30 marathon world record?
The Maurten team has shared his fueling plan.
The Maurten research team was embedded with Sawe’s team in Kenya for 32 days across six trips between last and this April. They were training his gut to absorb that load by mimicking race-day protocol in training. The hydrogel technology they have developed over the past 10 years now allows athletes to absorb 90–120 grams of carbs per hour without GI distress. In addition to that, sodium bicarbonate is also used, essentially a blood buffer since it neutralizes the lactic acid buildup that causes the burning sensation in muscles during high-intensity effort.
Sawe used both of Maurten’s products for it on race day. Taking the bicarb early is deliberate since it peaks in the bloodstream roughly 60–90 minutes after ingestion, so the timing of 2+ hours before the race would put peak buffering capacity right at the start.
Sawe told the media in the press conference that he had two pieces of bread and tea with honey as his breakfast before the race.
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Techieddie👨🏼💻 retweeté
A little more for the marathon nerds: Yomif Kejelcha ran 1:59:41 to become the second man under two hours in a legal race and he was on Sabastian Sawe's shoulder until 41K. Took a bit different of a fueling approach.
The Santamadre team, an emerging Spanish company, shared his fueling plan with the targeted amounts at each station. A few things stood out to me, if I'm reading this correctly. Kejelcha planned to take roughly 60ml of fluid at most stations, which is estimated at less than half of Sawe's intake (though it's worth noting runners often toss bottles quickly and don't hit their targets exactly). He skipped 5K entirely and took nothing at 40K.
🗣️Santamadre co-founder Alfonso Beltrá López: “We took advantage of the pre-race window to reduce digestive load as much as possible. We knew exactly how much fluid the athlete loses and how much energy his body consumes, as we had monitored him 24/7 over the previous three months: body temperature, breathing rate, heart rate and oxygen saturation. We also controlled his caloric load in detail. The strategy was to provide 287.4 g of carbohydrates between the pre-race and in-race fueling, in addition to the 580 g of glycogen we had built up during the two-day carb-loading phase before the race.”
I didn't know as much about their products beforehand but the Unusual Fuel (taken by him at 15K, 25K, 35K) is a high-carb drink mix: 100g of carbs and 500mg of sodium per 500ml. Unusual Gel 45 is a 45g carb gel in a 1:1 glucose-to-fructose ratio, available with or without caffeine. He used the caffeinated version pre-race and at 20K.
Then there's Reset Gel (10K, 30K), which is an interesting one. It's billed as a CNS fatigue blocker with 300mg of tart cherry polyphenols. It also has 30g of carbs. It kicks in quick and his two doses overlapped to cover most of the second half.
🗣️ López: “We used RESET Gel at 10K and 20K, a gel designed to help control muscle damage and reset fatigue. It was one of the key parts of our strategy, exactly as we had seen in the specific training sessions.”
Finally, the Prototype he sipped for 75 minutes pre-race is a new product in the works. Santamadre says more is coming on that in the months ahead.
🗣️López: “It was a real shame he couldn’t grab the last bottle at 35K. We believe everything could have changed. At 41K, he ran empty; those extra three minutes could have been covered by the 12.4 g of carbohydrates planned for that point.”
Chris Chavez@ChrisChavez
For other marathoning nerds – Maurten shared Jacob Kiplimo's fueling strategy for his 2:00:28 at the London Marathon (No. 3 all-time and also under the previous world record) with me and I think it's a little different. Jacob Kiplimo's fueling protocol 6:00 a.m. — Bread (small breakfast) 7:00 a.m. — Bicarb System 15 Pre-race — Drink Mix 320 In-race plan 5K — 240ml Drink Mix 320 10K — 230ml Drink Mix 320 15K — 220ml Drink Mix 320 20K — 200ml Drink Mix 320 25K — Water + Gel Caf 100 30K — 180ml Drink Mix 320 35K — 170ml Drink Mix 320 40K — 150ml Drink Mix 320 If I'm reading these right... Sawe front-loads with a fixed 160ml of Drink Mix 320 at every station from 5K through 40K. (Plus a Gel 100 Caf 100 added at 20K on top of his regular drink) vs. Kiplimo starts higher (240ml at 5K) and carefully tapers his volume down across the race: 240, 230, 220, 200, then a full break from carbs at 25K where he takes water and a caffeine gel only, before resuming with 180, 170, and 150ml to close. His total volume per station is actually higher early on, but he's taking in less and less as the race gets harder. The other notable difference is the bicarb. Sawe takes Bicarb System 12. Kiplimo takes Bicarb System 15. What's fascinating is how dialed this is for an athlete who's also racing, covering moves and responding to surges while running so fast. As Zouhair Talbi (who ran 2:03 at Boston last week) told me, many of these Kenyan runners don't tend to nurse fluids that deliberately. So the next step would be to watch back the tape and see how much he's actually guzzling early and if this is just the target, or if he's hitting these numbers exactly. Wish someone were able to collect all the bottles and then also see/share how much was actually consumed.
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Because he's already at his human limit 😭😭😭
Alexandra Pembroke@AlexPemOfficial
Might be missing something here but why wouldn’t the 2nd guy just speed up a bit and overtake?
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Well, I started out doing it like this, helps you get in tune with your body, but at a certain point, you gotta follow the data 🙃
TenDay@CaliTenDay
Friend started running a while back, and I asked how many miles she does a week and she told me she doesn’t know, that she just goes outside and runs and stops when she’s tired.
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Techieddie👨🏼💻 retweeté
Techieddie👨🏼💻 retweeté
