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jgrahamc

94,298 karma · joined July 2, 2007

https://jgc.org/
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jgrahamc··on The AI Race Just Got Awkward
Yes, but to expand on my flippant response, the opening of this post is a sign of bad writing. And I don't want to waste my time on bad writing.

It shows that the author hasn't thought about their audience and has assumed that everyone knew and used the same terminology as them. And, worse, assumed that they'd understand immediately why they were using that terminology.

The opening is If you read the news headlines these days, you would be forgiven for thinking that the Western labs are getting spawn-camped by Chinese labs en masse. If you don't know what spawn-camping is you're lost; if you do it's not obvious what that means in this context. Good writing brings the reader along with the writer.

It would have been clearer if they'd written: If you read the news headlines these days, you would be forgiven for thinking that Western AI labs are being outplayed by Chinese AI labs using something similar to the gamer technique of "spawn-camping". The Chinese appear to be waiting for each Western release and then instantly distilling it. A little like gamers waiting for their opponents to reappear (from the dead) at their camp and then kill them off immediately.

This is better because a reader unfamiliar with the idea of spawn-camping learns something and it explains the metaphor. But I could be wrong in my interpretation of why they are using spawn-camping since they fail to explain it.

jgrahamc··on The AI Race Just Got Awkward
I dunno, man, I first got on the Internet in 1986 and was Cloudflare's CTO for years. I've been online quite a bit.
jgrahamc··on GPT-6 Astra Solves a WWI German Radio Cipher
Oh yes, certainly, I am not blown away by what was done here. The AI had access to the cipher type and a list of keys.
jgrahamc··on GPT-6 Astra Solves a WWI German Radio Cipher
It is not a simple substitution using the polybius square with pairs of letters from ADFGVX mapping to 25 letters of the alphabet.

The first step is to take each letter and turn it into a pair of letters from ADFGVX but the second step is then a keyed columnar transposition.

jgrahamc··on A Biography of Lee Holloway, the Architect of Cloudflare's Technology (Part 1)
Thanks for reposting that. Re-reading my own words made me well up a bit at the memories of that time and working with him. And the final technical meeting I had with him where I couldn't understand why he was being oddly stubborn about an API definition. Looking back it was all part of his illness.
jgrahamc··on Getting your hands dirty is good for you
I parodied this sort of thinking via my alter-ego, Brad Bradstone [1], in a post called "My Treadwater Desk" (https://web.archive.org/web/20190802085907/http://doublestea...).

--- My Treadwater Desk

If you're the CEO of company, like me, you do a lot of sitting and talking. And all the evidence points to sitting being a disaster health-wise. As a father it's my responsibility to take care of my health over the long term so that my kids, Dagwood and Spaniel, have their father around for a long time. Sure, they don't see much of me because I'm building Yellow Yellow, but I want to be there when we can all enjoy the fruits of my labors.

So, I looked into the current fads running through Silicon Valley. NoSitting has displaced NoSQL as the current buzzword and there are two current solutions: standing up and walking.

At Yellow Yellow we like to blaze our own trail and in NoSitting we're no exception. But rather than standing up all day (which kills your legs and leads to varicose veins---a major problem if you plan on spending your retirement years in the Caribbean on the beach) or walking on a treadmill (which causes wear and tear on your ankles, knees and hips) I've come up with a far better solution.

The Treadwater Desk.

In our basement we had a disused well from back before our brownstone had municipal water. It didn't take much to fill the well with water and a bit of carpentry later and I had my laptop and an Apple Magic Mouse (wrapped in Saran wrap).

Now my day starts by changing into a suit (in this case a wet suit) and plunging into the chilly waters of my treadwater desk. That blast of icy water is better than any espresso from the Daily Grind and really gets me in the mood for work. Also, the vasoconstriction of most of my body means more blood for my brain to keep Yellow Yellow running.

Then it's treading water while Skyping with my team. I've found that using Siri I can dictate emails without a problem and the Magic Mouse is working well.

And let's face it, we all came from the sea originally and so treading water is natural for us all. It's also aerobic and far easier on the joints than walking. It's also a full body workout. Rather than just working on my legs I get every muscle moving. And the health benefits of that are well known.

It's also a metaphor for what it's like to be a startup CEO: I'm literally keeping my head above water all day long and if I don't keep making an effort I (and Yellow Yellow) would go under.

Finally, I'm planning to add Epsom salts to the water to increase buoyancy and help keep my skin in tip top condition.

[1] The inventor of double stealth mode (the public doesn't know what we're building and neither do we). https://news.ycombinator.com/item?id=4166183

jgrahamc··on LG smart TVs caught logging audio with screen off and snooping on local devices
Yeah. I own an LG TV also of about the same vintage. It doesn't get to talk to the Internet.
jgrahamc··on Your intellectual fly is open when you use an LLM to author a post (2025)
My worry is that if people can't express clearly, in writing, what it is they want to say then an LLM won't help them much. I've seen LLMs get the wrong end of the stick over and over and produce a huge chunk of text that's certainly readable and says something. It's just not clear that the something is the thing the person originally really wanted to say.

If you can write clearly enough to express your idea to an LLM, then perhaps you should just send that to the person you're writing to.

jgrahamc··on Your intellectual fly is open when you use an LLM to author a post (2025)
I take a different stance on your final point. I think people should absolutely not use AI tools for functional communication as a crutch because they struggle with writing clearly.

They need to learn to write clearly. I believe there's a direct connection between clear thought and clear words.

jgrahamc··on Your intellectual fly is open when you use an LLM to author a post (2025)
I think the most important line in this post is: But LLMs are also lousy writers and (most importantly!) they are not you.

When I was editing the Cloudflare blog I imposed very little in terms of style so that the style of each individual writer could come through. It was almost as important as the actual content that the reader could feel that an actual individual wrote the text (with all their personal quirks intact).

jgrahamc··on Saving 100 terabytes of memory by optimizing 1.1.1.1's DNS cache
One of the "evils" of premature optimization is how much time you spend on the optimization vs. the benefit you get from it. If your goal is correctness and shipping fast and you're not memory constrained then spending time using the least amount of memory is a waste of time specifically because you want to ship fast.

Another interesting thing that happens is you don't necessarily know what form your actual optimizations will need to take. Later when your systems grow you discover the suboptimal parts you hadn't optimized for.

Very early on at Cloudflare I worked on part of the DNS infrastructure that took DNS records from the UI and got them in a state for actual authoritative serving. The system had been constructed anticipating Cloudflare having millions of customers with unique domains, but it had not been constructed for a single customer with a single domain with millions of records. This caused a periodic slow down in DNS record updating while the system churned on that one customer.

In a different job I worked on a piece of optimization software that needed to keep track of "node" A is reachable from node "B". This had been implemented as a matrix (literally a malloced NxN matrix of ints storing 0 or 1) which worked really well for small systems. But you'd be out of memory really fast on a large project. I replaced the matrix with a hash table and all was good because the matrix was actually really sparse.

jgrahamc··on Being nude in public can make us feel better about our bodies
"Being exposed to average bodies, to average humans, makes you readjust your perspective about what is normal, and what is acceptable, and what is beautiful," says Rachitskiy.

I'm sure that's the crux of it. My own experience of nude beaches is that it feels normal and is very relaxing. You see other people nude and they are all normal bodies with all sorts of variety.

jgrahamc··on For no apparent reason Oral-B removed flossing from their app
Who knows? It's really weird. They made is so much worse... they even removed the red/blue colour coding for the yes/no buttons which made so much sense.
jgrahamc··on Exercise intensity modulates interorgan communication and is associated with
Yeah. The formula isn't terribly complicated: don't eat crap and move your body in different ways.

Despite doing exercise (including high intensity stuff like spin class) I was overweight and had a HOMA-IR of 3.8 (Moderate Insulin Resistance) and insulin 13.2 (Early Insulin Resistance).

This was because I was addicted to sugary stuff.

I cut my refined sugar intake to almost zero and in two months HOMA-IR went to 1.02 (Normal Range) and insulin to 4.9 (Optimal / Longevity Range). My triglycerides had peaked at 228 (Moderate Risk) and dropped to 96 (Normal/Good). Glucose went from 116 (Prediabetes) to 85 (Healthy).

My assistant in cutting all that sugar was Claude. I used Claude as my buddy: I'd chat with Claude when I had cravings and it gave me alternatives and support. And it worked.

jgrahamc··on Elevators
It also depends on the person understanding what the elevator button does: https://blog.jgc.org/2010/06/elevator-button-problem.html
jgrahamc··on Is Cloudflare classifying opencode.ai as malware?
I get the same set of IPs when hitting 1.1.1.1, 1.1.1.2 and 1.1.1.3.

Radar doesn't show it as classified as bad: https://radar.cloudflare.com/domains/domain/opencode.ai

jgrahamc··on Precursor
Huh?
jgrahamc··on Interrail: 6,379Km and 13 Countries over 7 weeks
In the middle of my doctorate I had a mini-crisis of "I'm not smart enough and I'm never going to manage this", got mononucleosis, and decided the cure was the US equivalent (the USA Rail Pass: https://www.amtrak.com/tickets/departure-rail-pass.html).

I spent weeks and weeks traveling around the US. The Amtrak system is much maligned but you get to move at a slow pace and see the country and meet people (some of which you would prefer to have not met).

I highly recommend doing it if you want to get a sense of the scale and diversity of the US.

During this trip, at the recommendation of a friend, I read (or tried to read) a number of "American classic" books which I would finish and then leave on the train for someone else to read. Catch in the Rye, Huckleberry Finn, To Kill a Mockingbird, The Great Gatsby, ... The only book I couldn't finish was, ironically, On The Road which I found utterly tedious.

jgrahamc··on Apricot Computers: An underrated British brand
I have an Apricot with the little LCD display on the keyboard. Six membrane keys just under the LCD and each of those keys has an LED in the bottom left corner.
jgrahamc··on Low-Background Steel
https://lowbackgroundsteel.ai
jgrahamc··on Workers Cache
I've tried this with my own blog posts from blog.jgc.org and the result was... not good. It basically wrote something that read like a parody.
jgrahamc··on Behind the scenes with the Midjourney scanner [video]
I agree. It's very clearly a research prototype and they are talking about getting it working to do body composition.
jgrahamc··on Temporary Cloudflare accounts for AI agents
I am here but I retired from being CTO of Cloudflare in March 2025 [1] and the current CTO is Dane Knecht (dknecht here). What advantage does decoupling Cloudflare Containers from Cloudflare Workers have?

[1] https://blog.cloudflare.com/three-chapters-at-cloudflare-pro...

jgrahamc··on Ask HN: What is your blog and why should I read it?
It's blog.jgc.org and you should read it if you like a mixture of electronics, programming, history of computing and just plain randomness.
jgrahamc··on Emacs appearances in pop culture
More great on screen code moments (I haven't got round to Superman III, yet): https://behind-the-screens.tv But Superman III is not just REM statements.
jgrahamc··on Emacs appearances in pop culture
It was 100% not Excel: https://blog.jgc.org/2023/07/unfortunately-kelly-rowland-cou...

Also, we're really close to the 24 year anniversary of "Dilemma": https://hollawhenyougetthis.com

jgrahamc··on Ask HN: Would it be useful to have a slop button in addition to flag?
Doesn't the flag button serve that purpose?
jgrahamc··on Nitpicking the shell history scene in 'Tron: Legacy'
That's not a project that excites me but good luck with it.
jgrahamc··on Nitpicking the shell history scene in 'Tron: Legacy'
Wonderful!

At the bottom he notes: "I’m sitting in the UK as I write this. Under UK law, I believe this should constitute fair dealing: the purpose is quotation for criticism and review, and this single screen capture is in no way an alternative to paying to see the original film. The film comes from the USA, and under USA law I think it similarly constitutes fair use: it’s for non-profit educational purposes, the amount of the full work used is extremely small, and the effect on the value of the full work negligible."

I took down my entire "Behind The Screens" YouTube channel and transferred it to my own site: https://behind-the-screens.tv because of copyright notices from YouTube that were heavily skewed towards the studios and I didn't have the energy to fight what was clearly fair use in my videos.

jgrahamc··on Ask HN: What old developer tool do you still miss?
These are still heavily used at airports and the sound of the dot matrix printer going at the gate is usually a sign that boarding is starting soon.
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