Weeknotes 262

“Every network. Fused.”

Your phone connects to EE, Three, Vodafone, and O₂ through a single eSIM. It automatically picks the strongest signal wherever you are — so you never lose connection again.

If this works, it’s a very good idea, and not stupidly expensive either.

If you’re a WhatsApp user you can now reserve your username in the app. Yes, I know Signal exists.

You don’t need ten agents. You need two tracks.

When you’re building customer-facing features and you want to build a great product, you can’t delegate UX to an agent. Yes, the agent can implement front-end code and wire it all up to your full stack. But once this part is done, you still need to iterate on the UI. Not because it has to be pixel-perfect, but because building a great product is subjective and opinionated, and that comes from you, not your agent.

In praise of memcached – It’s funny how we seem to have collectively forgotten about memcached since Redis came along. I don’t hear people talk about or use it any more.

Why dead code feels hard to delete

In reality, we should want to avoid future costs, regardless of what happened in the past. That’s what we should optimize for. Dead code just makes it harder for us to reason about the codebase, and it makes it more costly to introduce new code. That’s why we should remove it.

I’m keeping an eye on Bunny.net as an alternative to CloudFlare.

The new HTTP QUERY method explained

All of the above reasons resulted in the QUERY method being specified, after many years of discussion. The QUERY method is nothing special, the RFC roughly states that it is similar to the GET method, but with a request body. It is meant to be safe and idempotent.

BUSY Bar – I DO NOT NEED THIS.

A Gentle Introduction to Flamegraphs

What flamegraphs are, how to read them, and why they’ve become my favourite tool for understanding where time is actually spent in production.

From Elena at GitHub that I mentioned last week. I haven’t read this, but I know I’m gonna need it one day. Hopefully I’ll remember it if I put it here :D

You know I was searching for a DNS provider that had scoped access tokens such that you could create a token which only had access to update certain types of records for individual zones and record types? Well it sounds like Mythic Beasts has exactly that.

Credentials can be unrestricted, allowing them to manage all zones on your account, or restricted to individual zones, records and record types.

Something to consider in the future.

We went to see Toy Story 5 on Saturday ✅