jandrewrogers

4 ms·

1.
by jandrewrogers 8d ago
I think the more interesting story is the long-term decline in the quality of virtually all sovereign debt. Many things are anchored to the assumption that high-quality sovereign debt is widely available.
2.
Black Holes or Black Hole Stars? Astronomers Spar over 'Little Red Dots'(quantamagazine.org)
104 points by jandrewrogers 8d ago|60 comments
3.
by jandrewrogers 8d ago
Typically you would construct this state in statically allocated memory. A lot of systems work this way. Dynamic heap allocation isn’t the only alternative to stack allocation.
4.
by jandrewrogers 9d ago
Relatively speaking? Yes. Also, the layman rarely needs to know the boiling point of water. The freezing point is useful though. For serious scientific and engineering applications the freezing and boiling point of water isn't actually
5.
by jandrewrogers 9d ago
The US has the widest range of temperatures of any country. Locations can vary by >50°C in a 24 hour period. Extreme temperatures are familiar to Americans and their society is well-adapted to it. Calling Fahrenheit "western centric
6.
by jandrewrogers 9d ago
Kelvin is superior for science and engineering but doesn't arbitrarily anchor the scale to the freezing and boiling point of water in the way Celsius and Fahrenheit both do. 273.15 Kelvin doesn't roll off the tongue like 0°C or 32
7.
by jandrewrogers 12d ago
Nuclear winter scenarios have largely been debunked. Several different events in the 20th century had atmospheric impact on the same scale as modeled in a full nuclear exchange and the effects were modest. People have kind of mythologized n
8.
by jandrewrogers 14d ago
Stackful coroutines are cooperatively scheduled, unlike traditional threads, and context switch much more inexpensively. It is the reason people write stackful coroutine libraries instead of just using threads.
9.
by jandrewrogers 15d ago
I never implied my cardio fitness was poor, just that some metrics are relatively better than others. My RHR (currently 47-48 per various fitness trackers) has always been pretty elite. I don’t think about it and it doesn’t change much exce
10.
by jandrewrogers 15d ago
An issue here is that mmap and io_uring require fundamentally different software architectures in a performance context. You shouldn’t swap them out. APIs like io_uring, combined with O_DIRECT, allow you to design your own workload-specific
11.
by jandrewrogers 15d ago
I was running 10km 3x per week for a few years. When I started swapping some of those runs for HIIT, performance on the remaining 10km runs very noticeably improved in addition to the cardio metrics. To be clear, performance-maxxing was nev
12.
by jandrewrogers 15d ago
I have a pretty diverse training load these days. Hiking, mountaineering, running, plus a few sports and some resistance. While I have overtrained in the past on running in particular, it was mostly due to lack of diversity. Nonetheless, no
13.
by jandrewrogers 15d ago
As an anecdote of one, I was doing moderate intensity endurance exercise for a couple years with only modest improvements in basic cardiovascular metrics that kind of flatlined over time. As an experiment, I switched to high-intensity inter
14.
by jandrewrogers 15d ago
Some aspects of modern warfare seem to be taking the classic idea of light infantry and dialing it up to 11. They have little armor or heavy weaponry but are such a fluid sparse target and have such a small logistical footprint that they ar
15.
by jandrewrogers 16d ago
Cluster munitions are highly effective at destroying massed formations of men and equipment. This forces the attacker to heavily armor up, which doesn’t work well against modern cluster munitions, and/or disperse forces across a very l
16.
by jandrewrogers 16d ago
The recommendation is qualified for typical apps that do not have extreme performance or scale requirements. They use Java for many, many things. C++ is still indicated for systems that are optimizing for performance and scalability charact
17.
by jandrewrogers 17d ago
> biased towards the West and Northern hemisphere The widest range of temperatures found in any country is the USA. In the continental US alone the temperatures easily exceed -50°C and 50°C in both directions (much colder if you include
18.
by jandrewrogers 17d ago
> Its unit is the same of Kelvin, just shifted by 273 You mean shifted by 273.15 because Kelvin doesn't have tidy fixed points at the freezing and boiling point of water, unlike Celsius and Fahrenheit. Celsius and Fahrenheit are bot
19.
by jandrewrogers 17d ago
I assume the long stem increases the likelihood it will be dislodged from the ear because it increases torque at the point of contact when moving. The first AirPods were much less secure in the ear than current ones. Reducing stem length ma
20.
by jandrewrogers 21d ago
Direct Air Capture at any meaningful scale is predicated on mining billions of tons of refined minerals. The environmental impact of that would be so enormous that it will never be allowed to happen, never mind the severe resource crunch.
21.
by jandrewrogers 21d ago
Americans are from the United States of America in the same way Mexicans are from the United States of Mexico. When South Americans refer to Americans as "estadounidense" is that imperialist Mexico erasure? The USA is not the only
22.
Leading Theory for How Life on Earth Began Is 'Highly Unlikely'(sciencealert.com)
30 points by jandrewrogers 22d ago|1 comments
23.
by jandrewrogers 23d ago
I walked myself to and from kindergarten every day. Approximately the same age, same distance, and it went through a park with water. That was normal. The extreme neuroticism toward children having any kind of agency these days is unhealthy
24.
by jandrewrogers 24d ago
While not the common case, C++ move semantics match the situation in systems code where correctness requires decoupling logical object lifetimes and destructors. The object is logically dead but the destructor may be deferred indefinitely f
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by jandrewrogers 24d ago
As someone who lived much of their life in real poverty, you can live a pretty decent life on $50k in most of the US. Yeah, you won’t be posting your vacations on Instagram but who cares. Many people live a decent life within these income c
26.
by jandrewrogers 24d ago
Income from capital has a low tax rate in the US (and many other countries) because you can deduct neither losses due to inflation nor losses due to risk, both of which are substantial for capital income but non-existent for wage income. Th
27.
by jandrewrogers 26d ago
Yes, these types of scenarios are commonly handled with C++20 concepts. The main thing contracts do is provide a standardized scaffolding for enforcement.
28.
by jandrewrogers 27d ago
Focus on the missing prerequisites that are critical for any viable solution. It doesn't matter what anyone does if we literally lack the technical infrastructure required to make a meaningful difference. The first step is making it at
29.
by jandrewrogers 28d ago
People have been calling processing-in-memory "the future" since at least the 1980s. No one has been able to reduce the concept to a useful implementation but there is a long history of failed attempts. At this point processing-in
30.
by jandrewrogers 29d ago
This program targets acid rain. It only applies to coal and diesel. No one is building off-grid coal power plants. Diesel generators are the standard for power generation where a grid connection is not readily available and/or the powe

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