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David Andersen

@daveandersen.bsky.social
1.3K followers 899 following 3.7K posts

Computer Science Professor, CMU; co-founder and CTO, Enriched Ag Energy-efficient computing, a dash of security, and a pinch of databases. Also on Mastodon (hachyderm.io/@dave_andersen ) signal: dga.48 he/him

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David Andersen @daveandersen.bsky.social · 17h
Made the matcha chiffon cake from serious eats. It is good and surprisingly easy. 14 yo found the recipe and made it to bring to school, so clearly we needed one for the family too.
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David Andersen @daveandersen.bsky.social · 05/10/2026
aw yeah, thanks, CVS, I'm totally going to go pick up PAT_FNAME(10)'s drugs. Hope she has some good stuff waiting -- maybe some ipecac and lactulose.
A screenshot of a gmail line from CVS Pharmacy with subject line "PAT_FNAME(10)}, Your Order is Ready for Pickup at CVS"
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David Andersen @daveandersen.bsky.social · 04/10/2026
Chirashi time
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David Andersen @daveandersen.bsky.social · 02/10/2026
ooh tomorrow's going to be fun, isn't it? 😆 Trying to thread the timing needle - hopefully shoulder is better for climbing on Sunday, and still functional for class today. I've never gotten them together before, but it was certainly convenient. (And the nurse had mad shot skills. Zero pain. Woo.)
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David Andersen @daveandersen.bsky.social · 02/10/2026
I realize it was irresponsible for me to post that without the obligatory huge pig picture from (Shane Dunlap | TribLive). triblive.com/business/duq...
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David Andersen @daveandersen.bsky.social · 30/09/2026
Huh. Apparently now I am a professor in the Griffin School of Computer Science. I choose to believe it's a mythology reference. We should rename our competitive programming team or hacking team the LionEagles. www.cmu.edu/news/stories...
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David Andersen @daveandersen.bsky.social · 29/09/2026
It's mine and you can't take it away from me!
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David Andersen @daveandersen.bsky.social · 29/09/2026
Dear puppy with razor sharp teeth, I will WIN THIS BATTLE, with the POWER OF TECHNOLOGY
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David Andersen @daveandersen.bsky.social · 29/09/2026
The emails from the teachers are images or PDFs. I like the organization - for example, this is from this week's newsletter, but I can't even copy-paste the entries to put them in the calendar. The in-service days are in the school calendar but the pink out & own clothes days are not.
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David Andersen @daveandersen.bsky.social · 27/09/2026
made gougeres to bring to the block party. It turns out there is such a thing as eating too much puff pastry. don't think I'll be making those again for a while. 🤣
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David Andersen @daveandersen.bsky.social · 25/09/2026
The phone scammers have defeated me. Five or more calls per hour for multiple hours per day making it through Google fi's spam prevention and many bypassing android phone screen. Time for the nuclear option. Hope nobody needs to call me for a while! 😭
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David Andersen @daveandersen.bsky.social · 19/09/2026
Year 3 of the 5lb CO2 tank. Only got 11 months out of it this time and the price of the refill went up from $13 to $14, but still a huge win over $17 for a 0.9lb refill with exchange for sodastream’s little co2 thingies. $0.06 / liter of carbonated water vs like $0.40/liter. 🤓
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David Andersen @daveandersen.bsky.social · 14/09/2026
puppy and i are having the same reaction to monday morning* (* ok, this is only partly true. we're both sleepy but I didn't poop on the floor. yet.)
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David Andersen @daveandersen.bsky.social · 11/09/2026
It amuses me that the easiest way to get the dog crate to my office was to take it on the cargo bike - the university seems to frown on the idea of me parking my car on the sidewalk next to the entrance to the building but they have kindly provided a bike rack there. 🤓
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David Andersen @daveandersen.bsky.social · 08/09/2026
Mistakes were made
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David Andersen @daveandersen.bsky.social · 07/09/2026
i am goose destroyer, hear me roar
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David Andersen @daveandersen.bsky.social · 07/09/2026
Crag puppy's first time climbing went well.
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David Andersen @daveandersen.bsky.social · 07/09/2026
Tryin' out some classic Pittsburgh rock 🤣
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David Andersen @daveandersen.bsky.social · 06/09/2026
I let the garden be taken over by volunteer butternut squash this year, but fortunately, they roasted up very well. Which is good, because there are like five more in there.
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David Andersen @daveandersen.bsky.social · 04/09/2026
niche AI comment: I used to like Artificial Analysis as a way to quickly eyeball models, but their use of TerminalBench 2.1 is making them useless for what I actually care about. It's saturated. Consider below. Gemini 3.8 "wins" TerminalBench 2.1 but is remarkably behind on 4.0, which ...
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David Andersen @daveandersen.bsky.social · 04/09/2026
No. My daughter got a couple of stills but that's all.
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David Andersen @daveandersen.bsky.social · 03/09/2026
my theory: spacex suffered some datacenter problems. they rent capacity to anthropic, so anthropic started barfing. when anthropic started barfing, everyone switched and tried to use openai, and openai started barfing. curious to learn what really happened.
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David Andersen @daveandersen.bsky.social · 02/09/2026
sleeping puppy is best puppy particularly since she's not trying to eat my ankles while asleep.
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David Andersen @daveandersen.bsky.social · 01/09/2026
First attempt at bring your puppy to work day is going pretty well so far, though it took both me + 14yo to manage her effectively through a meeting. :) (Goal is to make sure she's well-socialized to work so that once she's capable of settling more I can bring her regularly.)
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David Andersen @daveandersen.bsky.social · 29/08/2026
Now witness the power of this fully prepped and operational burrito station* *It does not make space laser sounds :(
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David Andersen @daveandersen.bsky.social · 27/08/2026
Puppy day 6: oh thank god, dr. prof. spouse found the stealth poo and got rid of it
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David Andersen @daveandersen.bsky.social · 26/08/2026
Puppy crate training progress as measured by sleeping heart rate patterns. Good progress. That first night was rough.
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David Andersen @daveandersen.bsky.social · 25/08/2026
Floppy ear brigade reporting for duty
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David Andersen @daveandersen.bsky.social · 24/08/2026
Sorry, image says jan 19 clerical jan 20 PD, I mean
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David Andersen @daveandersen.bsky.social · 24/08/2026
I love working at a university. ,🤣 (photograph is from today at cmu. This thing is a couple of years old, but I hadn't seen it before..)
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David Andersen @daveandersen.bsky.social · 24/08/2026
Yes, you (admittedly cute) little monster, sleep, sleep, get all of the sleep you didn't get last night while waking me up every 45 minutes.
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David Andersen @daveandersen.bsky.social · 21/08/2026
Oh dear. We seem to have added someone to our family. Nova, meet bluesky.
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David Andersen @daveandersen.bsky.social · 18/08/2026
Decided to treat ourselves a little for our last night in Iceland. Mmmm.
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David Andersen @daveandersen.bsky.social · 16/08/2026
yes please, more glacier
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David Andersen @daveandersen.bsky.social · 15/08/2026
Pretty glaciers, too (Iceland)
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David Andersen @daveandersen.bsky.social · 12/08/2026
2026 99.2% eclipse as viewed from Iceland. 🤣 With a bonus spider that was hanging out at our hotel, which seems to have a remarkable collection of large spiders outside the windows. (It -was- noticeably dark. But very cloudy)
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David Andersen @daveandersen.bsky.social · 12/08/2026
'sup dudes?
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David Andersen @daveandersen.bsky.social · 11/08/2026
8yo found a unique way to shower today
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David Andersen @daveandersen.bsky.social · 10/08/2026
Iceland continues to impress with its waterfalls
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David Andersen @daveandersen.bsky.social · 08/08/2026
Second Iceland impression: big waterfall! (Glymur; it's 650 feet tall) It was also about 48F with a little rain and sustained 35+ mph winds driving the rain right against us, plus a calf-deep icy river crossing, so a little dash of adventure on an otherwise short hike. 🤓
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David Andersen @daveandersen.bsky.social · 07/08/2026
Iceland impression thus far: rainy, pretty, and with a surprisingly high hot spring to person ratio
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David Andersen @daveandersen.bsky.social · 03/08/2026
I failed to repair the light on my back porch (the top keeps coming off) and now a second family of doves has moved in. I think I should just give up and let them have it at this point.
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David Andersen @daveandersen.bsky.social · 02/08/2026
Just to make sure my kids grow up with some weird ideas about food... Chili oil agave Brussels sprouts Soysauge and onion pizza Okonomiyaki-inspired shiitake-zucchini pizza with mayo and bonito
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David Andersen @daveandersen.bsky.social · 26/07/2026
Mmm. The salt and baking soda dry brine idea for pan grilling shrimp works really well.
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David Andersen @daveandersen.bsky.social · 26/07/2026
I hadn't realized they lit them at night!
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David Andersen @daveandersen.bsky.social · 26/07/2026
Little bit of ancient Pittsburgh for the evening Carrie furnaces, a former blast furnace
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David Andersen @daveandersen.bsky.social · 17/07/2026
Breathing outside without a mask is like licking a fireplace today. 🤮Horrifying to think that 100 years ago, Pittsburgh was like this nearly every day. Pour one out for air quality regulation and the EPA for helping transform the city into a great place to live.
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David Andersen @daveandersen.bsky.social · 17/07/2026
RIGHT? We've hit brown but fortunately not the off-scale brown, which, uh, looks the same as the on-scale brown. Also what's with the scale changing from being +50 to suddenly going +100 and then "and up" in the same physical distance? I'm sure they get this a lot though. :)
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David Andersen @daveandersen.bsky.social · 16/07/2026
Urp-ple Pittsburgh
Screenshot of AQI meter showing AQI 255, very unhealthy, coded purple
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David Andersen @daveandersen.bsky.social · 13/07/2026
Actually, that turns out to have been wrong. PJM now announcing that we _did_ set a new peak load record of 168,158MW. So I take that back - record-setting, not rare. :) But factoring in demand response is a little tricky to juggle. insidelines.pjm.com/pjm-serves-l...
PJM reached an all-time peak load estimated at 168,158 MW between 5–6 p.m. July 2 according to preliminary figures that factor in demand response programs that serve to suppress electricity demand. PJM’s previous peak record was 165,563 MW, set on Aug. 2, 2006.
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