skysight-inc/HackerNews huggingface dataset:
The recording data rate is highly workload-dependent. For Firefox I find it's often around 1MB per second but your daemon could be a lot more or less than that, depending on what it does.

A few hundred gigabytes may sound like a lot, but it costs less than $100 so if it saves you a significant amount of time, why not? The biggest problem using rr with a very long trace is that to debug it you need to replay all the way forward to the crash point, which might take you another day or longer. Though that's just machine time so you can run that in the background while doing other work.
Silly mortals and their non-N-body problems!
honestly, I blame the phrase "conspiracy theory" and it's constant misuse for the fact that people conflate hypothesis and theory.
Presumably they passed flags to gcc (or whichever compiler they used) to disable these optimizations, otherwise, you're right, they wouldn't make much sense if the code wasn't actually being run as presented.
Is Bavaria considered the Texas of Germany?
The features and general approach are quite similar.

There are some significant internal differences. UndoDB relies on code instrumentation but rr does not. Mainly because of that (AFAIK), UndoDB's recording overhead is significantly higher than rr's. On the other hand, UndoDB can handle some cases rr does not, in particular when a recorded task shares memory with another task which is not part of the recording. Also, UndoDB supports ARM/Android and rr does not.
It runs at 1/10 speed because it's interpreted bytecode, and it allocates a new PyInt object for each number in the loop.

You can get it back close to native speed by adding a type annotation and compiling the python file with Cython: http://docs.cython.org/src/userguide/language_basics.html#in...

def f(NUMBER):
cdef int i
for i in range(NUMBER):
pass
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> It's a shame that none of this has tricked down into the open-source version.

Greenplum is an MPP database forked from the Postgres 8.x codebase. It'll be opensourced soon.
This is a resource you'll never find elsewhere. All the links come from manual research. (Yes, they are in Chinese language, they are authentic).
Fantastic visualization! Any idea about the tools used to achieve that result?

Inspecting the code a bit I'd say regarding the viz it's based on leaflet.js+canvas(custom overlays)? No trace of d3js, threejs,etc.

I'm happy to see riotjs so nicely used as well.
Yesterday I uploaded 12GB to Glacier and big surprise for me was price per upload request:

$0.055 per 1,000 requests

Command line tool[1] split my 12GB into 1mb chunks and generate around 12k requests:

$0.055 per 1,000 requests	12,694 Requests	$0.70

So bigger chunks are cheaper, but probably generate more retries.

[1] - https://github.com/uskudnik/amazon-glacier-cmd-interface
you, sir, are excellent at using propaganda to discount people's claims. when malice is assumed, you discount it with "mustachio twirling" strawmen.

Now, instead of talking about the parent's point of direct anticompetitive behavior, we're somehow discussing "whispers of monopolies" that somehow put the burden of proof back on the grandparent, even though anyone older than 24 knows why microsoft is still not to be trusted.

I'm bookmarking your profile, so I can study your future comments. you seem to be on the bleeding edge of these advances. thank you for the excellent study tools.
Nobody (hopefully!) is defending important library optimizations.

The kind of unnecessary optimizations I think about as being undesirable are when you spend a week's worth of engineering effort and go through a potentially risky data migration just in order to improve the performance of a command-line production environment management tool that is run once per few months, that only takes a few minutes to run anyway, and whose data is cached server-side by the application running it anyway.

Actual example from my software engineering career.

But for library code, that potentially thousands or even millions of systems in production worldwide are going to be using? Hell yes. That is worth the time to improve. And kudos to you on improving Node postgres performance. That's awesome.
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The first C result is absurd, not sure how the author could have gotten it.

First of all, the code as written will just optimize to nothing, so we need to add an asm("" : "=g" (s) : "0" (s)) in the loop to stop strength reduction and autovectorization, and we need to return the final value to stop dead code elimination.

Once that is done, the result is more than 2 billion iterations per second on a ~3 GHz Intel desktop CPU, while the author gives an absurd value of 500m iterations which could not have been possibly obtained with any recent Intel Xeon/Core i5/i7 CPU.

BTW, the assembly code produced is this:

1:

add $0x1,%edx

add $0x1,%esi

cmp %eax,%edx

jne 1b

Which is unlikely to take more than 1/2 cycles to execute on any reasonable CPU as my test data in fact shows.
TalkTalk was hacked. But it's silly to ask if the data was encrypted
The Denver Rocky Flats injection quakes of the 1960s stopped within months of halting injections. I dont think ending oil production is politically platable, so they will have to find alternative waste treatment.
Publish date May 2014 - still, glad to see it solves most (but not all) the issues with the known differences between the near and far sides. Another argument for a lunar base so we can safely get some samples to do more hands-on comparisons.
Do I take it that you think it shouldn't be legal to sell organs?

And I assume you agree with most of the rest of the world, that organ donation should be legal, and that selling things should be legal.

It follows that arguments of the form: "A is legal, and B is legal, so the combination should be legal", are not very convincing to you. So you don't get to use that argument in favour of prostitution.

I'm not arguing pro-organ selling, here. I'm arguing anti-bad arguments.
It's pretty amazing how much computation you can buy for less than a cup of coffee.

For less than 20 cents (in quantity, perhaps) you can buy a chip that out-performs the personal computers available in the early 80s. Of course you have to add peripherals to bring it to true parity, but you can probably have a working board for about five bucks that'll run rings around an Apple II or a vintage PC. The keyboard and monitor are the most expensive components.

Likewise, memory. Recently I was thinking about doing some optimization and reorganization of some data for a hardware management project, when I realized that the data, for the entire life of the project, would fit into the CACHE of the processor it runs on. Projecting out five or six years, it would always fit. I stopped optimizing.

Most of the time, the most valuable resource is the time of the person involved. Shaving milliseconds of response time rarely matters, shaving an hour of dev time does. (There are big exceptions to this when you are resource-constrained, as in video games, or hardware environments that need to use minimal memory or cycles for cost reasons).

Premature optimization still remains a great evil.
Well there's always flags to prevent compiler optimizations, or maybe the example was purposefully presented in readable C, not whatever hack you'd need to do to bypass optimization. Inline assembly isn't exactly C anymore.

But yeah, I was surprised by the number of operations per second too. I was thinking it had to be over a billion.
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> Don't get the point of this article. "We slaughter billions of cows, but walk up to one, look it in the eyes, and they clearly are saying, to any human, 'Can I be your friend, human?' What gives?"

Having spent a good deal of time around cattle, this is absolutely not the case. They're some of the dumbest animals I've ever owned. They do seem emotional, though - they often seem sort of sad, and are easily paniced.

The smartest farm animal I've been around are hogs. They're mean, too.
> Comets may preserve ancient layered splat structures; the European Space Agency’s Rosetta mission, now on its way to Comet Churymov-Gerasimenko, will be able to take a look.

http://www.esa.int/Our_Activities/Space_Science/Rosetta/How_...
As a developer, I think we'd all be better off if all software was developed on 5-year-old machines, databases pre-loaded with a million records, and Redis and Memcached swapped out with instances that use disk, not RAM.
But I assume some versioning of the implementation is also required, no? After all, your laptop may claim to implement USB3.0 but has a bug which is particular to this laptop version.

BTW, this form of versioning is common in the Java world where APIs are standardised in the form of JSRs. An application server implements multiple JSRs, so every application server version lists what particular JSR (spec) versions it implements.
Televisions cost several months wages when they came out in the US the 1950s. Yet most families acquired them. The installment system- weekly, monthly- was the way of buying expensive appliances before credit cards became common. I belive TVs spread around the wotld in a similar fashion. Now tablets.
"paternity" == father

For a mother, it's called "maternity"

Many people who are learning English (as I presume you are) learn the language is genderless, but that's not strictly true.

http://dictionary.reference.com/browse/paternity
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You're unique...just like everybody else.
Yes - every other case where paternity tests have failed has simply been unreported, or not investigated sufficiently to invalidate the test.
I'm not seeing where you deal with micros() overflow .. also using time as a var name is poor form.
Oh wow, I had no idea Greenplum was being open sourced, that's great news. I fiddled with it 6 years agocomparing it and Vertica for some large scale analytics work and it was pretty impressive.. I wonder how hard to merge Postgres head features back into Greenplum though, or vice versa. Probably not gonna happen?
Rather suspicious, repeated, mentions of 23andMe. This reads more like an advertisement in disguise rather than "news".
No, you're mistaken. It is actually a very big problem. Earlier on the same page you linked to, it explain that "ICANN approved the Internationalized domain name system, which maps Unicode strings used in application user interfaces"[1].

As a concrete example, the following are fake links to Wikipedia (and entirely equivalent):

http://xn--wkd-8cdx9d7hbd.org (FAKE, same as below)

http://www.wіkіреdіа.org (FAKE, same as above)

It is true that network protocols encode these internationalized domain names in a subset of ASCII, but the user sees Unicode in his browser address bar or email. There is no restriction on how applications (like browsers) display domain names[2]; they can use Unicode if they want. This lead to all sorts of devious attacks[3].

[1] https://en.wikipedia.org/wiki/Domain_name#Internationalized_...

[2] https://en.wikipedia.org/wiki/Internationalized_domain_name#...

[3] https://en.wikipedia.org/wiki/IDN_homograph_attack
Even as someone who uses and is fairly happy with ISO week numbers, I think you're quite right.

The problem isn't the ISO 8601 calendar - smart people have thought about these things, and it's probably the best decision to let 2015-W53 contain days in 2016 (gaining in return a contiguous calendar of weeks each with seven days). But 'week numbers year' is obscure enough to deserve a noticeably different format letter.
Yeah those links don't even come to close backing up your assertions....

They believe that 95% of the prostitutes in Denmark are already familiar with prostitution when they arrive, know they need to cooperate with pimps to get on, and are not used to working with law enforcement. The police try to establish which of the prostitutes are there legally: those who are not will be transferred to the department that deals with illegal immigrants.
But the basics are pretty much the same, no matter if it is python or assembly: does this one-liner run entirely or mostly in L1 cache, or does it have to wait for RAM access repeatedly? Does it have to wait for disk or does it have to wait for network? Repeatedly? People who fail at this won't be able to understand the difference between situations where python or not doesn't matter much and those where it does.

Understanding that "computers are fast" (even in python!) is a very important step towards understanding where we make them slow and whether that is because of waste or because the task is naturally expensive.

Based on your skepticism i assume that you just haven't had much exposure to people who are really bad at these thing, despite having all the formal education (and the paycheck to match). "I'm working in ${absurdly high level language}, of course i'm not supposed to care for performance" is what they tell you before venturing off to make a perfectly avoidable performance blunder that would be crippling even in fully vectorized assembly, followed by a few days spent transforming all their code a different, but perfectly equivalent syntactic representation that looks a bit faster.
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What is the reason grsecurity never got integrated into Linux mainline?
Why do the standard paternity tests not notice when someone is effectively the child's uncle? The genes must match to a far greater extent than an "unrelated" person. Is that information lost between the actual test and the "yes/no/probability" result?
You should really check out how random people code in the real world. C is absolutely not the right language for "Dad" while Python is very easy to start with and do advanced stuff with. I am not talking about "programmers" but "people who manage to automate things on their computer".
Being mixed race myself, I faced a similar problem; too white for brown people, too brown for white people. The only thing you can really do is to learn to love yourself, because that's one thing you can't change.
Oh, so that was you Chris!

No hard feelings at all mate. It didn't work out in the end btw, she cheated on me.
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Not exactly, you've not demonstrated that the private schools have any incentive to even try. They can cream off the healthy, docile and rich and make money from that, so why should they accept any more challenge than that? After all, once you've done the initial skim, you don't actually need to be good educationalists, the filter has done all the work for you, and every kid you reject makes your competition look worse.

Plus the research shows private schools don't actually help you educationally, so they (like charter schools) must actually be worse at their jobs once you factor in the head start that selection gives them.
Okay, then he's not - sorry - still that's beyond the point really, I think it's a bit over the top in and of itself
The difference between idle and full power is very large in modern CPUs - a typical laptop one can consume an average of a few watts at idle, but several dozen at full load; furthermore, they can switch between these states thousands of times per second. This is why CPU power circuitry is not easy to design, since it has to keep up with the very fast changes in current as the CPU transitions between power states.

Incidentally, this is also why you may be able to hear audible sounds from a computer when it's idle or running some particular process - the wakeups/sleeps are happening at a frequency in the hearing range, and the components like capacitors and coils can act as tiny speakers.
As this is from 1995, can anybody tell how this work has evolved since then? Are the techniques presented in this paper still relevant?
Indeed they are. Here in the states it is against the law to feed them or even approach them according to the Marine Mammal Protection act although I've witnessed people ignoring this. I have seen them follow bait balls close in to shore.
For the people who don't need to realize that a 20% discount on $37.50 is $30, why bother sending them to school past 6th grade at all?

Now that I see your argument more fully, it seems less like an argument against testing and more like an argument against wasting resources on unneeded education. Do you believe the people who don't need the specific topics you mention actually do need education beyond grade 6? If so, why?
The cash assistance programs being cited were carried out in poor countries, from what I can tell. Maybe that works in a country where you never have enough. I'm not sure the results apply here to the United States.

I could not disagree more with the title, based on my own observations. I mean, aren't most of the people in this country poor because of mental illness or addiction?
It is allowed under the "as if" rule. If no visible aspects of the program are changed by an optimization, then it is allowed. The value stored in memory is not considered to be a visible aspect, and so the compiler is allowed to modify which memory is changed.

It's the same as inlining a function. The standard says that a function call is a function call. Compilers are still allowed to inline the call, even if it has not been specifically marked as "inline".
>So your opinion is "If it's slow it's okay, because it's safer than optimizing?".

No. My opinion is that if it's slow you need to check to see if it's actually a problem for the users first before optimizing. Unless...

>And that's where your actual noticable inefficiencies far too often stem from: Inexperienced developers who don't know how to do it the easy way

I already said this below:

>Cleaning up dirty code that incidentally causes performance improvements is fine
It's no longer taboo to engage in sex outside of marriage

Oo

I don't know what planet you live on, but I'm fairly sure, side from open marriages where the couple mutually agrees to this, sex outside marriage isn't so much taboo as explicitly ruled out by definition.

And while divorce may not be a "scandal" per se, its certainly not considered desireable.

In short, you seem to have a bizarre view of marriage in the modern world.
I'm not sure the floating ip solution from digitalocean is going to be the solution - as it looks like it's only for public ip addresses instead of internal ips... Assuming you only want you db listening on internal ip right?
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Depends which beach? While there is genuine danger, they might have been playing that up for you with respect to that particular location....I will point out that in 2000, they had a lower murder rate than Chicago, thanks to the excellent work of the CPLC.

I'm shocked you had to hide her identity in Karachi - usually there and Punjab are welcoming of visiting Indians, esp. if they're your wife
DIBELS, MAPS, Common Core, etc. Some of these happen multiple times a year.

I honestly can't remember all of the names, but I can assure you there were more. I was a tutor -- I never administered any of these tests -- and it was three years ago. Just Google "first grade standardized tests" and you'll find some more, though I can't remember which of those in particular the kids at my school took. Each state has its own standardized tests too...

To be honest, I enjoyed taking standardized tests when I was a student, but it became clear to me that for most kids (most of whom didn't have the stress-free, charmed existence that I had growing up) it's just demoralizing and useless.
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What? No. 15% of the population is at or below the poverty line. Very few of them have ment illness or addiction. Most are simply born into circumstances with little opportunity (urban or rural), and don't have the exceptional qualities needed to break out of those trajectories.
The totally unpredictable strikes (good luck trying to catch a flight at the airport during one, let alone do your daily shopping), roving extortion gangs, and torrential floods during monsoon complete with downed electric wires can be a bit of a drag.

(My mother's side of the family lives there, mother was born there and it's the address on my Pakistani identity card. I visit every other year.)
Off topics but the fact that Uber requires you to have the latest version of its app to book rides is ridiculous. Not everyone has the newest smartphone with tons of space to update apps.
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Not necessarily, because a robust DSL can enforce its semantics. When your "DSL" is just a string to the parent language, not so much. (Though modern compilers can emit warnings about obvious printf issues like incorrect types.)
Not 100% sure but this precise optimization for LLVM is probably part of ScalarEvolution, which tries to figure out how values in a loop evolve: http://llvm.org/devmtg/2009-10/ScalarEvolutionAndLoopOptimiz...

LLVM also has a pass dedicated to detecting loop idioms: http://llvm.org/docs/doxygen/html/LoopIdiomRecognize_8cpp_so...

(I'm not at all familiar with how GCC is architected, sorry)
Put aside for a moment the racist implications of the bylaws and consider just the legality of listing the house publicly:

I think the league can legally prevent the listing. They own the land on which the house stands. In cases like these the homeowners lease the land. I think it could be legal for a private community that owns its grounds to prevent someone from listing their house publicly. If the homeowners were able to pick their house up and move it off the land they would not have to abide by the terms of the lease anymore, but if it's written into the lease you are legally obligated to follow the terms. If your house is permanently there you are pretty much screwed.

Of course, that is assuming that everything else is on the level and you aren't violating federal law with the terms of your lease (like only accepting people of German descent).
"Teaching to the test" generally doesn't mean covering the material that the test is intended to cover in theory, it means drilling the exact format of questions, studying previous years, knowing exactly what you can sacrifice coverage of, how to guess multiple choice questions when you don't know the answer etc. Basically over-optimizing to fit an imperfect model.

Now, I'm a good test taker generally, and it has always helped me in life, and I will ensure my children know the rules of the game. But from the perspective of the country or planet, that's not time and effort well spent, it's a zero-sum arms-race that could have been better spent.

There's more to this, e.g. the fact that the tests are really testing the teachers (again very imperfectly), that some people want to privatize education and so on, but "teaching to the test" is a well known anti-pattern for good reasons, even though the individual incentives push us in that direction.
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I think if you're a driver, an up to date phone is a business expense. The latest version of the app doesn't require the latest phone - just enough space.
Growth efficiency is one thing .. integrating micro controllers that pamper your plants hands-free is another thing entirely! :)