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Cory Benfield

@lukasa.hachyderm.io.ap.brid.gy

381 followers 2 following 45 posts

Funny, once in a while. He/him/his. [bridged from hachyderm.io/@lukasa on the fediverse by fed.brid.gy ]

Posts Replies Media

Cory Benfield @lukasa.hachyderm.io.ap.brid.gy · 30/08/2026

@bitprophet I’ve got a colleague where he and his wife have almost identical vehicles from the same manufacturer. I believe they are explicitly or implicitly getting a deal from the dealer by buying multiple vehicles at once.

Cory Benfield @lukasa.hachyderm.io.ap.brid.gy · 28/07/2026

Has anyone ever researched why check (cheque) (bill) splitting at restaurants is so weird in the USA compared to everywhere else with digitised payments? In the USA my experience has been that any non-trivial check splitting is refused by the server. Split two ways evenly, sure. Maybe as high […]

Original post on hachyderm.io

Cory Benfield @lukasa.hachyderm.io.ap.brid.gy · 27/07/2026

@bagder We have a general-purpose implementation of an earlier draft, but I think only the protocol support, it hasn’t made it into a full server yet.

Cory Benfield @lukasa.hachyderm.io.ap.brid.gy · 11/07/2026

@glyph I’ve never thought about a Community College in my entire life, and yet somehow I’m in it too!

Cory Benfield @lukasa.hachyderm.io.ap.brid.gy · 02/03/2026

@siracusa The Private Cloud Compute software stack is not only distributed to security researchers, but to the general public: security.apple.com/documentation/pr…

security.apple.com

Cory Benfield @lukasa.hachyderm.io.ap.brid.gy · 21/02/2026

@bitprophet @offby1 I’m super basic so I enjoy all the straightforward platitudes of the Death series. Meanwhile I find Rincewind insufferable. The only good Wizards books are the ones that don’t involve him at all.

Cory Benfield @lukasa.hachyderm.io.ap.brid.gy · 18/01/2026

@helge @pasi X-to-grid is worth it in some places depending on the electricity market. Here in the shoulder seasons a 30-min time of use tariff can vary by upwards of 20p/kWh over the course of a day. That allows a very valuable arbitrage if you have the storage! As for the roof, yeah, I do […]

Original post on hachyderm.io

Cory Benfield @lukasa.hachyderm.io.ap.brid.gy · 17/01/2026

@pasi Yeah, I get that. In general the thing that’s economically interesting in those circumstances is battery storage. People tend not to think of it, but batteries by themselves are useful for tariff arbitrage. I suspect wider use of vehicle to grid will get more of this happening, but you can […]

Original post on hachyderm.io

Cory Benfield @lukasa.hachyderm.io.ap.brid.gy · 17/01/2026

Incidentally; my best day with this array was 23kWh of generation. That’s a huge amount of power: more than many households use in a day. And it’s not that big an install!

Cory Benfield @lukasa.hachyderm.io.ap.brid.gy · 17/01/2026

But I’m still a solar booster. Right now I’m getting quotes to double the size of the system, to 7kW, and quadruple the battery size. With that I’ll move to a time of use tariff, because a 20kWh battery means I can go an entire day without grid usage in the shoulder seasons and summer. Winter […]

Original post on hachyderm.io

Cory Benfield @lukasa.hachyderm.io.ap.brid.gy · 17/01/2026

I think this is a useful chart, because it reveals the fundamental challenge the UK faces with renewables; and so the importance of rounding out with wind and storage. My generation comes overwhelmingly in the summer, where I can nearly zero out my consumption […] [Original post on hachyderm.io]

Cory Benfield @lukasa.hachyderm.io.ap.brid.gy · 17/01/2026

So the economics. We exported 470 kWh. Our supplier (Octopus) pays us 15p/kWh, so they paid us £70.50 for our exported electricity last year. Our supplier charges us a unit rate of 26.06p/kWh for our imports. We therefore saved £695 from our directly consumed electricity. We consumed 9000kWh […]

Original post on hachyderm.io

Cory Benfield @lukasa.hachyderm.io.ap.brid.gy · 17/01/2026

Last year; the panels generated a total of 3,300 kWh: 28% of our consumption. (As a sidebar, 3.6kW is the largest solar array you can install on your roof without getting grid operator permission, so it’s a common size) For folks with angled roofs in London, you’d probably do better than this […]

Original post on hachyderm.io

Cory Benfield @lukasa.hachyderm.io.ap.brid.gy · 17/01/2026

On the “flat” roof, we have 12 400Wp panels. They are laying flat, but the roof is slightly cambered for drainage, so 6 are facing 3 degrees SSW and 6 are facing 3 degrees NNE. These are wired to a 3.6kW inverter, because there was no way these panels would generate more than 3/4 their rated […]

Original post on hachyderm.io

Cory Benfield @lukasa.hachyderm.io.ap.brid.gy · 17/01/2026

For context, Ofgem thinks the average 2-3 bedroom house in the UK consumes 11,500 kWh of gas and 2,700 kWh of electricity annually: a total of 14,200 kWh. So we’re already below this: the heat pump is a major reason why, even though the property is quite poorly insulated. As a sidebar here […]

Original post on hachyderm.io

Cory Benfield @lukasa.hachyderm.io.ap.brid.gy · 17/01/2026

The home is entirely electric. Heating is from an air-to-air heat pump, hot water is from an immersion heater (big kettle), ovens and stovetop are electric and induction respectively. Unusually for the UK we have a heat pump tumble dryer; and we use it religiously because it keeps humidity under […]

Original post on hachyderm.io

Cory Benfield @lukasa.hachyderm.io.ap.brid.gy · 17/01/2026

First, the home. We live in a top floor flat (condo for Americans) in London. The flat is about 1400 sq ft (130 sq m) of interior space on a single level. 3 bedrooms, 2 bathrooms. Built in the 1960s so it has uninsulated cavity walls, but we did retrofit substantial insulation to the flat roof […]

Original post on hachyderm.io

Cory Benfield @lukasa.hachyderm.io.ap.brid.gy · 17/01/2026

It’s early in January and the sun is out so my mind has turned to rooftop solar. Time for a retrospective on my rooftop solar install in the UK. The UK is typically regarded as a poor location for rooftop solar compared to the rest of the Anglophone world, or much of Europe. That’s true: Spain […]

Original post on hachyderm.io

Cory Benfield @lukasa.hachyderm.io.ap.brid.gy · 23/10/2025

@designatednerd @simon Just a longer process. I like using a chatbot style model to chat through an idea and then get _it_ to write the seven paragraph prompt.

Cory Benfield @lukasa.hachyderm.io.ap.brid.gy · 17/08/2025

I firmly believe the two most comfortable wide-body aircraft for passengers are the A380 and A350.

Cory Benfield @lukasa.hachyderm.io.ap.brid.gy · 14/08/2025

@offby1 I got burned by that last week too. I had to temporary lift the “no internet access for my TV" settings in the router firewall so I could log in on the smart TV that I have enforced to be dumb.

Cory Benfield @lukasa.hachyderm.io.ap.brid.gy · 14/08/2025

@glyph Absolutely true. The other reality of DoS attacks is that they tend not to be launched in a drive-by fashion: they tend to be targetted.

Cory Benfield @lukasa.hachyderm.io.ap.brid.gy · 13/08/2025

@glyph FWIW I agree with all of this. I think these categories of protocol attack are theoretically interesting, but mostly are relevant for servers without “protection”, by which I mostly mean no load balancers or other frontends. I don’t think most folks deploy Twisted that way, so in some […]

Original post on hachyderm.io

Cory Benfield @lukasa.hachyderm.io.ap.brid.gy · 13/08/2025

Hey folks, if you’re running swift-nio-http2 we recommend you update to 1.38.0 as soon as possible. NIO defends against the new MadeYouReset attacks out of the box, but we have added some belt-and-suspenders defences to mitigate more sophisticated versions of the attack. These are available in 1 […]

Original post on hachyderm.io

Cory Benfield @lukasa.hachyderm.io.ap.brid.gy · 29/07/2025

Gosh United’s Basic Economy is terrible. Definitely a product the airline fully does not want you to buy.

Cory Benfield @lukasa.hachyderm.io.ap.brid.gy · 26/07/2025

On behalf of an entire continent I feel very comfortable saying: get fucked. www.theguardian.com/us-news/2025/ju…

theguardian.com

Trump tells Europe to ‘get your act together’ on immigration before US-EU trade talks

Ursula von der Leyen will meet with US president on Sunday, who describes ‘20 sticking points’ in negotiations

Cory Benfield @lukasa.hachyderm.io.ap.brid.gy · 11/06/2025

It’s rare to see a talk that so effectively demonstrates not just the tools for performance analysis, but the approach that leads to good results. This is a talk I wish I’d thought to give, but Matt absolutely crushed it. Comfortably my favourite session of WWDC 25 […]

Original post on hachyderm.io

Cory Benfield @lukasa.hachyderm.io.ap.brid.gy · 23/04/2025

@atpfm Relevant to the Cursor support chatbot blowup, Air Canada lost a court case on this: www.bbc.co.uk/travel/article/202402…

mastodon.social

Accidental Tech Podcast (@atpfm@mastodon.social)

503 Posts, 4 Following, 18.4K Followers · Three nerds discussing tech, Apple, programming, and loosely related matters. Hosted by Marco Arment, Casey Liss, and John Siracusa.

Cory Benfield @lukasa.hachyderm.io.ap.brid.gy · 08/04/2025

I’m a touch surprised that I can’t find any off-the-shelf examples of a fused spur with an integrated Shelly. I have found two: one is a relay without energy monitoring, and the other is a subscription service. What am I missing?

Cory Benfield @lukasa.hachyderm.io.ap.brid.gy · 08/04/2025

Hanging out at QCon today. Come find me if you want to chat about Swift, memory safety’s services development; or anything else!

Cory Benfield @lukasa.hachyderm.io.ap.brid.gy · 14/02/2025

@matthew We're hybrid: 3 days a week in the office (Tues/Weds/Thurs), plus the option for a few remote weeks a year.

Cory Benfield @lukasa.hachyderm.io.ap.brid.gy · 14/02/2025

Want to work on server-side networking in the Swift programming language at Apple? My team has multiple positions open, at various experience levels: jobs.apple.com/en-gb/details/200590…. We're hiring senior and junior positions […]

Original post on hachyderm.io

Reposted by Cory Benfield

okpierre @okpierre.bsky.social · 14/01/2025

Alternative photo community using activitypub called Vernissage if anyone wants to try. Since it uses activitypub it can interact with Mastodon, Pixelfed & others Angular, Swift, PostgreSQL, Redis, S3 ObjectStorage #fediverse #activitypub #photography #angular #swift #postgresql #redis #mastodon

Alternative photo community using activitypub called Vernissage if anyone wants to try. Since it uses activitypub it can interact with Mastodon, Pixelfed & others

Angular, Swift, PostgreSQL, Redis, S3 ObjectStorage

Alternative photo community using activitypub called Vernissage if anyone wants to try. Since it uses activitypub it can interact with Mastodon, Pixelfed & others

Angular, Swift, PostgreSQL, Redis, S3 ObjectStorage

Reposted by Cory Benfield

daniel:// stenberg:// @bagder.mastodon.social.ap.brid.gy · 31/01/2025

The morning after. Feels surreal and humbling.

Cory Benfield @lukasa.hachyderm.io.ap.brid.gy · 31/01/2025

@bagder Fully deserved. I can't think of anyone who has earned it more.

Cory Benfield @lukasa.hachyderm.io.ap.brid.gy · 29/01/2025

@glyph Cory: oh hey glyph you’re back early Glyph: computer’s haunted Cory: what? Glyph: *loading a pistol and sitting back into his chair* computer’s haunted

Cory Benfield @lukasa.hachyderm.io.ap.brid.gy · 23/12/2024

@chrisjrn American helps as well because they’re an alliance partner for BA so status etc works well

Cory Benfield @lukasa.hachyderm.io.ap.brid.gy · 23/12/2024

@chrisjrn Yeah, we’ve done PHL a few times before. I hadn’t considered American but it’s honestly worth a thought. I’ll scout ticket prices.

Cory Benfield @lukasa.hachyderm.io.ap.brid.gy · 23/12/2024

@chrisjrn I’ve also flown on G-VIIA twice, which is literally the oldest aircraft in BAs fleet.

Cory Benfield @lukasa.hachyderm.io.ap.brid.gy · 23/12/2024

@chrisjrn LHR<->EWR, which I fly frequently. BAs 777-200ERs are _very_ old though. I just got off G-RAES, which is 27 years old and felt every year of it.

Cory Benfield @lukasa.hachyderm.io.ap.brid.gy · 23/12/2024

Unrelatedly, I’m getting more and more disappointed with BAs increasingly aged fleet of 777-200ERs. Even with the newer business class product, the noise and cabin altitude are markedly worse than almost any other aircraft in the fleet.

Cory Benfield @lukasa.hachyderm.io.ap.brid.gy · 23/12/2024

@regehr If you ever have an integer type floating around in your code whose byte ordering is anything but native you messed up. This pattern tends to come from a kind of “C brain” where network packet headers are “parsed” by just casting a pointer to a buffer. This is unholy, and God will call […]

Original post on hachyderm.io

Cory Benfield @lukasa.hachyderm.io.ap.brid.gy · 23/12/2024

This is a phenomenal post, and well worth internalising for network engineers. If I see a htons in your PR I will reject it until it’s replaced. mastodon.social/@regehr/11370306079…

mastodon.social

John Regehr (@regehr@mastodon.social)

just wanted to remind people about this old blog post about dealing with byte ordering https://commandcenter.blogspot.com/2012/04/byte-order-fallacy.html

Cory Benfield @lukasa.hachyderm.io.ap.brid.gy · 20/12/2024

@bitprophet Yep, getting cold in NJ! Good luck!

Cory Benfield @lukasa.hachyderm.io.ap.brid.gy · 20/12/2024

It has been zero days since a mysterious throughput problem turned out to be TCP slow start.

Cory Benfield @lukasa.hachyderm.io.ap.brid.gy · 20/12/2024

@mjg59 spotted in Guardian article reporting on Craig Call-Me-Satoshi Wright.

Cory Benfield @lukasa.hachyderm.io.ap.brid.gy · 17/12/2024

@bagder For validating certs using the platform trust store while not using the platform TLS library, we have an example you can use: github.com/apple/swift-nio-ssl/blob…. Swift code, but I’m sure a dedicated contributor […]

Original post on hachyderm.io