jandrewrogers

5 ms·

1.
by jandrewrogers 4d 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.
2.
by jandrewrogers 5d 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
3.
by jandrewrogers 6d 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
4.
by jandrewrogers 6d 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
5.
by jandrewrogers 6d 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
6.
by jandrewrogers 6d 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
7.
by jandrewrogers 6d 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
8.
by jandrewrogers 6d 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
9.
by jandrewrogers 6d 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
10.
by jandrewrogers 7d 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
11.
by jandrewrogers 7d 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
12.
by jandrewrogers 7d 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
13.
by jandrewrogers 11d 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.
14.
by jandrewrogers 11d 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
15.
Leading Theory for How Life on Earth Began Is 'Highly Unlikely'(sciencealert.com)
30 points by jandrewrogers 12d ago|1 comments
16.
by jandrewrogers 13d 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
17.
by jandrewrogers 14d 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
18.
by jandrewrogers 15d 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
19.
by jandrewrogers 15d 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
20.
by jandrewrogers 16d 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.
21.
by jandrewrogers 17d 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
22.
by jandrewrogers 18d 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
23.
by jandrewrogers 19d 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
24.
by jandrewrogers 19d ago
It isn't just emergency generators. Many non-emergency generators are used because there is no grid to connect to and/or the power requirements are not anticipated to be permanent. The cost of a grid connection can greatly exceed
25.
by jandrewrogers 20d ago
This kind of encoding[0] is ubiquitous in networking protocols. It scales down to small silicon well and enables the receiver to estimate resource requirements or skip parts of a serial byte stream without storing it in memory first. These
26.
by jandrewrogers 20d ago
> Only about 37% of adults hold stocks, bonds, or funds outside of a retirement account. That's surprisingly high. I know several people with millions in their retirement accounts and nothing outside. It is also not uncommon for peo
27.
by jandrewrogers 20d ago
An important point is that "capital" is essentially just another way of saying "investment". Investment is what creates opportunities and demand for labor. Strong demand for labor increases wages e.g. construction wages
28.
by jandrewrogers 22d ago
> there are plenty of DCs in hot and arid regions Differences in air temperature are largely below the noise floor in terms of impact on data center cost. Slightly lower energy prices and other operational or capital costs are more than
29.
by jandrewrogers 22d ago
Now do the amount of water required for subsidized corn ethanol. 30 million acres, trillions of gallons of water, and almost no redeeming value.
30.
by jandrewrogers 25d ago
Poor people absolutely are wasting money but it doesn’t matter. I did it, everyone does it. The “wasting money” argument is hyper-analytical and not a productive accounting of human behavior. Almost no one in the US is literally negative on

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