Hacker News: jacobp100

New comment by jacobp100 in "The road to electric in charts and data"

jacobp100 — Sun, 29 Mar 2026 10:15:56 +0000

The only people I know with full EVs don't have driveways. It's not really an issue - you can charge when you go grocery shopping

New comment by jacobp100 in "Apple's MacBook Neo makes repairs easier and cheaper than other MacBooks"

jacobp100 — Thu, 12 Mar 2026 20:41:29 +0000

Apple has a third party sell them - https://selfservicerepair.eu/en-GB/home

New comment by jacobp100 in "MacBook Pro with M5 Pro and M5 Max"

jacobp100 — Tue, 03 Mar 2026 15:19:33 +0000

I was looking into this. The M5 performance cores can be scaled down to match efficiency cores in performance and power usage.

I believe they lower the clock speed, limit how much work is done in parallel on each core, and limit how aggressive the speculative execution is so less work is wasted.

New comment by jacobp100 in "Spinning around: Please don’t – Common problems with spin locks"

jacobp100 — Thu, 29 Jan 2026 09:42:19 +0000

The guy you relied to wrote the locking code. If you’re so certain they’re doing it wrong, would it not be easier to just prove it? It’s only one file, and they already have benchmarking set up

New comment by jacobp100 in "Heathrow scraps liquid container limit"

jacobp100 — Tue, 27 Jan 2026 08:33:51 +0000

I think all UK airports have easy to find water bottle refill stations

New comment by jacobp100 in "Chromium Has Merged JpegXL"

jacobp100 — Tue, 13 Jan 2026 08:34:26 +0000

JpegXL and AVIF are comparable formats. Google argued you only needed one, and each additional format is a security vulnerability.

New comment by jacobp100 in "Vector graphics on GPU"

jacobp100 — Wed, 07 Jan 2026 13:40:43 +0000

> I am curious if the equation of CPU-determined graphics being faster than being done on the GPU has changed in the last decade

If you look at Blend2D (a CPU rasterizer), they seem to outperform every other rasterizer including GPU-based ones - according to their own benchmarks at least

New comment by jacobp100 in "Why is the Gmail app 700 MB?"

jacobp100 — Tue, 06 Jan 2026 17:28:45 +0000

Safari probably is that size because WebKit is a system framework, so it’s just the size of the UI code

New comment by jacobp100 in "Tube trains could navigate the Underground using the rules of Quantum Physics"

jacobp100 — Tue, 06 Jan 2026 11:23:54 +0000

The train now approaching platforms 1 and 2 is the…

New comment by jacobp100 in "Tube trains could navigate the Underground using the rules of Quantum Physics"

jacobp100 — Tue, 06 Jan 2026 11:23:13 +0000

The signals bounce off the tunnels a lot

New comment by jacobp100 in "CSS sucks because we don't bother learning it (2022)"

jacobp100 — Mon, 05 Jan 2026 17:47:42 +0000

> Why do you think the padding as a percentage is relative to the width of the parent? Do you think it was a happy accident? I don't think so, it was purposefully put there in the specs so that we could have boxes with fixed aspect ratios. This is just the tip of the iceberg.

It’s because you cannot do a percentage of a height unless your parent’s height is fixed - something that happens naturally maybe 1% of the time. You’d be missing vertical borders in almost every case with your suggestion

New comment by jacobp100 in "It's hard to justify Tahoe icons"

jacobp100 — Mon, 05 Jan 2026 12:53:29 +0000

I hope with Alan Dye now out of Apple they will revisit a lot of what just happened. There’s been a lot of places where things have just become worse

New comment by jacobp100 in "Geometric Algorithms for Translucency Sorting in Minecraft [pdf]"

jacobp100 — Thu, 25 Dec 2025 21:17:07 +0000

I had a blog post on something similar (but less sophisticated)

https://jacobdoescode.com/2025/05/18/precomputing-transparen...

New comment by jacobp100 in "Fabrice Bellard Releases MicroQuickJS"

jacobp100 — Tue, 23 Dec 2025 20:23:15 +0000

Since you’re on the topic, what ever happened to the multi threading stuff you were doing on JSC? Did it stop when you left Apple? Is the code still in JSC or did it get taken out?

New comment by jacobp100 in "CSS Grid Lanes"

jacobp100 — Sat, 20 Dec 2025 11:42:35 +0000

iOS used to do this using the Cassowary constraint solver pre-SwiftUI. It’s the worst thing to work with. So much code turning on and off constraints, dynamically adding constraints when you have new views. And that’s before you get into conflicts

New comment by jacobp100 in "CSS Grid Lanes"

jacobp100 — Sat, 20 Dec 2025 11:35:01 +0000

This might actually happen indirectly. Kagi’s new browser uses WebKit. macOS only now, but eventually it’ll come to windows

New comment by jacobp100 in "Ask HN: Those making $500/month on side projects in 2025 – Show and tell"

jacobp100 — Thu, 18 Dec 2025 15:04:21 +0000

I do a few apps that get about this, but the one most interesting to the audience here is a scientific calculator for iOS, iPadOS and macOS

https://jacobdoescode.com/technicalc

One time payment, no subscriptions or IAPs

New comment by jacobp100 in "Show HN: Titan – JavaScript-first framework that compiles into a Rust server"

jacobp100 — Wed, 17 Dec 2025 12:04:15 +0000

This basically makes a rust server to do the routing, then uses the Boa JS engine to evaluate the JS to handle the route

With this approach, you might be able to do some multithreading to improve the throughput

However, each request is almost guaranteed to be slower because V8 will be faster than Boa

You could also achieve this by spinning up multiple NodeJS instances and putting an nginx server in front to do load balancing - which is pretty standard practice

New comment by jacobp100 in "UK's first small nuclear power station to be built in north Wales"

jacobp100 — Sun, 16 Nov 2025 20:27:50 +0000

The reactors will also be cast in the UK by Sheffield Forgemasters

New comment by jacobp100 in "Solar-powered QR reading postboxes being rolled out across UK"

jacobp100 — Sun, 02 Nov 2025 21:19:46 +0000

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