keldaris

40 ms·

331.
by keldaris 9y ago
So, as I understand it, the only way to avoid the rather huge performance hit is to use the pti=off switch, in effect opting out of KASLR on any Intel CPU newer than Pentium. Is this correct?
332.
by keldaris 9y ago
> Conversely, cost is highly relevant for non performance cars, which, from the perspective of displacing transportation petroleum use, are far more important. Absolutely. I was responding to a post about performance cars, so I stuck to
333.
by keldaris 9y ago
I wasn't making an argument about ideology or ethics, merely pointing out that my post was focused on the immediately measurable objective characteristics of cars - price and performance. I do recognize that people often buy electric c
334.
by keldaris 9y ago
> Admittedly, battery capacity costs money. Price-sensitivity is the reason most of these newly-announced cars don't have as much range. It is not a technical limitation. I disagree. The costs will drop, sure, but that's not pa
335.
by keldaris 9y ago
Exactly. And, with very few and very expensive exceptions, electric cars are useless at this. Electric cars have objective selling points, but I cringe every time I hear someone describe them as having "good performance".
336.
by keldaris 9y ago
To offer a slightly anecdotal counterpoint, if you discard ideological reasons and generous subsidies available in a few markets, I have no idea why anyone would buy an electric car right now. The range and the charging times are still an i
337.
by keldaris 9y ago
Are these particle.io kits completely soldering-free? I've been looking to experiment a bit with some embedded projects purely for fun and I don't mind low level programming at all (if it has a C compiler or at least a decent asse
338.
by keldaris 9y ago
Assuming the article is to be trusted, I see two insights here. First, even today only 30% of users use adblockers. Helping educate people is still the best way we can fight against this parasite of an industry. Every time a friend asks me
339.
by keldaris 9y ago
While I don't disagree with you that beyond 64 bit precision is often useful, be careful with overgeneralizing that point. Many applications are just fine with 32 bits or even less and benefit greatly from the associated speedups, henc
340.
by keldaris 9y ago
As a completely anecdotal and medically irrelevant personal counterpoint, I actually frequently find myself having much better sleep after having had two glasses of good cognac before sleep. I've certainly not made a daily habit of it,
341.
by keldaris 9y ago
Well, to be fair, some of their inability to cash in on the web could be attributed to the regulatory hurdles (especially in Europe, but with global consequences) they faced in their attempts to push IE as part of the OS, etc. I do agree wi
342.
by keldaris 9y ago
I think there's a further reason why Linus' tone could be seen as reasonable in addition to those already outlined by the other replies. One of the criticisms these cases get is that Linus is effectively using his abrasive languag
343.
by keldaris 9y ago
Oh, so the cracked version that inevitably comes out will actually have decent performance? Adorable. Can't wait. It's often been the case that pirated versions are objectively superior to the crippled originals, but I don't
344.
by keldaris 9y ago
Because, insofar as relatively large non-specialist (comparatively speaking) news aggregators go, HN is the only one where smart, well-spoken individuals still form a meaningful part of the user base. In fact, apart from a few highly specia
345.
by keldaris 9y ago
I'm not really sure how wasting a bit of water while brushing your teeth in Berlin could be considered particularly immoral or unethical. Berlin is, as far as I know, in no danger of water shortages and being more frugal with water in
346.
by keldaris 9y ago
> while the grandparent started with "As a physicist", as if this conveys the consensus among physicists, they forgot to mention that many physicists (including celebrated physicists) are indeed very interested in the meaning a
347.
by keldaris 9y ago
As a physicist, all this talk about the "meaning of time" (which has been going on for centuries and in the modern form for decades) seems completely meaningless. This article, as far as I can discern, makes no scientific claims o
348.
by keldaris 9y ago
Not sure exactly what simulation you're referring to with the position example, in most of my code that would either be fixed in the next timestep or make the whole thing blow up immediately. Anyway, I haven't argued against using
349.
by keldaris 9y ago
That's right, I'm sorry if I worded it ambiguously in my previous posts. ECC RAM is considerably slower than non-ECC RAM, but nowadays it's mostly because of looser timings and lower frequencies. I'm well aware that ther
350.
by keldaris 9y ago
That's right, any iterative solver method (which already encompasses most of the low level numerical solvers used in physics today) or, more generally, any method that algorithmically guarantees satisfying a particular mathematical con
351.
by keldaris 9y ago
The performance penalties I'm referring to are memory performance penalties. If your workload isn't memory-bound (and most aren't), you'll measure a difference of 2% or less, sure, but that's not really relevant whe
352.
by keldaris 9y ago
As I understand it, the situation is even better (as in, less errors) than that with DDR4. Unfortunately, all the published data I could find is woefully out of date. Still, even if you generously assume something on the order of one correc
353.
by keldaris 9y ago
Just to offer a partial counterpoint to the popular "ECC is a must for real work" sentiment, I've ran many 60-day simulations where a few bit errors would be completely irrelevant. Many physics simulations include internal ch
354.
by keldaris 9y ago
I may be biased (physics postdoc), but I think a lot more people have read (as in properly read, not just skimmed or cherry picked) the Feynman lectures than TAOCP. They're very approachable to anyone who understands basic real analysi
355.
by keldaris 9y ago
Could you elaborate on what's "unbelievably good" about it? From a quick glance at the site and documentation I don't see any particularly distinguishing features.
356.
by keldaris 9y ago
> Perhaps Intel is banking on the Z370 chipsets being the Intel equivalent of AMD's AM4 -- a chipset that sees support until the introduction of DDR5 memory. Hah, you wish. It's already been leaked [1] that next year's 8 c
357.
by keldaris 9y ago
Before I moved to e-cigarettes (and when I still didn't hate travelling), I had a memorable experience desperately trying to find a smoking lounge in an airport in Prague with a friend before our connecting flight took off. Got lost, s
358.
by keldaris 9y ago
Whenever I see these types of laws actually being applied, I wonder why the companies involved don't just outsource the payments to subsidiaries in jurisdictions that don't have (or don't enforce, which is most of them) such
359.
by keldaris 9y ago
With the minor caveat that the "free, open economy" (which is really neither free nor open, but I digress) contains strong incentives to prioritize growth and short term profits over other considerations. From the perspective of m
360.
by keldaris 9y ago
While your statement can certainly be correct for a sufficiently stringent definition of "advanced" (and replacing "instructions" with "code patterns", etc.), in my experience in using both clang for C++, Julia

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