jgrahamc

I'd also say that when you look at JITed language like Lua and JavaScript the performance is pretty damn impressive. As with so many things it depends what you're doing.

Source: I was Cloudflare's CTO.

https://blog.jgc.org/2022/10/pimping-my-casio-with-oddly-spe...

https://blog.jgc.org/2025/07/pimping-my-casio-part-deux.html

1. A password manager that generates my passwords stored on an external USB key (which is itself encrypted). I use KeepPassXC.

2. More than one Yubikey doing U2F.

I know how to backup #1 and I have more than one of #2 to handle losing a Yubikey. #2 gives me phishing protection.

This was pretty standard behaviour during the Cold War. Growing up in England I was well aware that a nuclear war could happen at any time and that England had absolutely no defence. And so we carried on living.

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.

Since I have no idea what "spawn-camped" means I gave up reading the rest.

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.

--- 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

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.

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

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).

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.