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Using the Adafruit breakout board, I had no problems other than an SPI bug in the Arduino core. Be warned that they are fragile when not protected, I sheared off the flex cable on one which was not fun.

Official refresh rate is ~25 hz, unofficially they seem to be able to go a lot faster (2-3X) if you don't mind increasing power consumption. And it's faster if you update only some lines. But by then you have run into a limitation in how fast the liquid crystal can respond.


Yeah that would be another few orders of magnitude smaller power budget. But I love the idea.

My project so AMA (although this doesn't seem to be blowing up here on HN :-)



IPC is still improving, so single thread performance is still increasing, even if clock speeds are not (at least not at the same as before). And new instructions (AVX ect) also help, especially if you can optimize and recompile your code.

It's at least enough that we have to take it into account:

We run our workloads across multiple Intel cpu generations and to be able to optimize utilization we have a "speedup factor" which is currently up to 1.7 for the latest generation we've tuned it for. And the base 1.0 performance is from Ivy Bridge, launched 2013.


There is a forum dedicated to devices like this at https://forum.ei2030.org/ - also a zulip chat linked there which is more active.


Reminds me of the recent Lisperati1000: https://www.hackster.io/news/the-lisperati1000-is-a-cyberdec...

I think these personal terminals are really cool, and might foster some interesting innovation in the near future.


Do people seriously program Lisp in 2021 or is it just a hobby/retro thing now?


This forum was written in Arc which is a dialect of Scheme.


There's much in this thread about the helmet absorbing the energy of the impact, but that's far from the whole benefit of wearing one.

The helmet, by conforming to the shape of your head, distributes the energy from the point of impact to a much larger area. So instead of having your head cracked open at the point it hits the tarmac, or pierced by a pointy rock, the force will be evenly distributed across your head.

The helmet also has a low-friction shell that will slide across a surface, which helps avoid head rotation, snapping your neck or getting whiplash, and will protect you from cuts and abrasions.

I've been saved by my helmet many times.


Just an FYI to your last paragraph: The core indexing/ranking/storage components of Vespa are C++, and run in a separate process (no jni).

In my own attempt to compare the two, I found the memory consumption of Vespa was easier to predict and understand (there are formulas for it in the documentation).


Thanks, I didn't know that!


Here’s a sensor that’s already used by the local police to monitor the breathing of those locked up over night - to be able to respond asap if someone stops breathing after excessive drinking or drugs. Seems benevolent to me. https://www.xethru.com/x4m200-respiration-sensor.html


I find this to be an interesting question. Given a modern, high-performance compiling lisp implementation on a modern CPU, say SBCL on x86_64.

What modification or addition to the CPU (or wider computer architecture) would be most effective in making typical lisp programs run faster?


Technological innovation can also arise as a consequence of the minimum wage being high. By increasing the cost of human labor, automation becomes relatively cheaper / more cost effective.

Here in Norway this has led to the near complete elimination of classes of jobs. As a very visible example, we have no toll booth operators or garage attendants, these have been universally replaced by automatic license plate recognition.

Thankfully we have a (relatively) good social safety net to take care of those who lose their jobs to such things.


I feel strongly that any economic system where automation is bad for laborers is fundamentally broken. Each automation should lead to shorter work hours for someone, without loss in pay, because it's not like the productivity has gone away.


If I start a parking lot business, and want to put automatic gates, am I supposed to pay someone for the productivity of that automatic gate? And why should I have to do that?


A basic income would solve this kind if problem without putting the burden on individual businesses...


I agree with you, I just want to know what he's proposing.


Shorter work hours for who?


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