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CppCon 2014: Chandler Carruth "Efficiency with Algorithms, Performance with Data Structures" - YouTube
- idk how I feel about this
- makes a distinction between efficiency (basically asymptotic complexity, "doing less work") and performance ("doing that work faster"). idiosyncratic terminology but similar to the "two performance aesthetics" described here:
- some bikeshedding about vector::reserve and references
- "discontiguous data structures are the root of all evil" (cache-locality, don't use linked lists, etc)
- stacks? queues? just use vector. also suggests circular buffers. says std::deque is really bad
- std::map is bad too (for real SWE, not oly-programming). if you want ordered associative container, just binary search in vector
- std::unordered_map is poorly implemented, unfortunately (due to requirement for buckets in API)
- good implementation of hash table uses open addressing and local (linear?) probing
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5 weeks ago by nhaliday
Information Processing: Remarks on the Decline of American Empire
1. US foreign policy over the last decades has been disastrous -- trillions of dollars and thousands of lives expended on Middle Eastern wars, culminating in utter defeat. This defeat is still not acknowledged among most of the media or what passes for intelligentsia in academia and policy circles, but defeat it is. Iran now exerts significant control over Iraq and a swath of land running from the Persian Gulf to the Mediterranean. None of the goals of our costly intervention have been achieved. We are exhausted morally, financially, and militarily, and still have not fully extricated ourselves from a useless morass. George W. Bush should go down in history as the worst US President of the modern era.

2. We are fortunate that the fracking revolution may lead to US independence from Middle Eastern energy. But policy elites have to fully recognize this possibility and pivot our strategy to reflect the decreased importance of the region. The fracking revolution is a consequence of basic research from decades ago (including investment from the Department of Energy) and the work of private sector innovators and risk-takers.

3. US budget deficits are a ticking time bomb, which cripple investment in basic infrastructure and also in research that creates strategically important new technologies like AI. US research spending has been roughly flat in inflation adjusted dollars over the last 20 years, declining as a fraction of GDP.

4. Divisive identity politics and demographic trends in the US will continue to undermine political cohesion and overall effectiveness of our institutions. ("Civilizational decline," as one leading theoretical physicist observed to me recently, remarking on our current inability to take on big science projects.)

5. The Chinese have almost entirely closed the technology gap with the West, and dominate important areas of manufacturing. It seems very likely that their economy will eventually become significantly larger than the US economy. This is the world that strategists have to prepare for. Wars involving religious fanatics in unimportant regions of the world should not distract us from a possible future conflict with a peer competitor that threatens to match or exceed our economic, technological, and even military capability.

However, I'm not sure that OBOR (One Belt One Road) and a focus on the "world island" of Eurasia will be a winning strategy for China. Mackinder's dream of a unified or even fully economically integrated world island will have to overcome the limitations (in human capital, institutions, culture, etc.) of the under-developed middle...

The belt-and-road express: China faces resistance to a cherished theme of its foreign policy:

The staggering scale of China's Belt and Road initiative:
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november 2017 by nhaliday
Which industries are the most liberal and most conservative?
How Democratic or Republican is your job? This tool tells you:

What you do and how you vote:

trending blue across white-collar professions:
This is partly because the meaning of left and right changed during that period. Left used to about protecting workers. Now it's mainly about increasing the power of the elite class over the working class - thus their increased support.
yes, it is a different kind of left now


The Legal Academy's Ideological Uniformity:

Homogenous: The Political Affiliations of Elite Liberal Arts College Faculty:
includes crosstab by discipline
Neil Gross, Solon Simmons

another crosstab
description of data sampling on page 21, meant to be representative of all undergraduate degree-granting institutions

Computer science 32.3 58.1 9.7

It’s finally out–The big review paper on the lack of political diversity in social psychology:
What’s interesting about Haidt’s alternative interpretation of the liberal progress narrative is that he mentions two elements central to the narrative—private property and nations. And what has happened to a large extent is that as the failures of communism have become increasingly apparent many on the left—including social scientists—have shifted their activism away from opposing private property and towards other aspects, for example globalism.

But how do we know a similarly disastrous thing is not going to happen with globalism as happened with communism? What if some form of national and ethnic affiliation is a deep-seated part of human nature, and that trying to forcefully suppress it will eventually lead to a disastrous counter-reaction? What if nations don’t create conflict, but alleviate it? What if a decentralised structure is the best way for human society to function?
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september 2017 by nhaliday
Does Polarization Imply Poor Representation? A New Perspective on the “Disconnect” Between Politicians and Voters*
Broockman-Ahler 2015

immigration positions under B.2:
38% support immediate mass deportation of all illegals (Broockman 2015). This view has zero representation in either house of congress.

Do you understand the GOP play here by the way? I'm genuinely puzzled. Is it a moral conviction? Because it can't be a vote play.
In my view it's a mix of mindless sentimentality, the donor class, and existing in an hermetically sealed ideological bubble.
cheap labor lobby, public choice (votes), & subversive elites gripped by multiculti zealotry
In a 2014 radio interview, Paul Ryan was asked if "immigrants from the 3rd world are more or less likely to support conservative policies":
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september 2017 by nhaliday
Muscle, steam and combustion
Vaclav Smil’s Energy and Civilization is a monumental history of how humanity has harnessed muscle, steam and combustion to build palaces and skyscrapers, light the night and land on the Moon. Want to learn about the number of labourers needed to build Egypt’s pyramids of Giza, or US inventor Thomas Edison’s battles with Nikola Tesla and George Westinghouse to electrify homes and cities, or the upscaling of power stations and blast furnaces in the twentieth century? Look no further.
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august 2017 by nhaliday
On the measuring and mis-measuring of Chinese growth | VOX, CEPR’s Policy Portal
Unofficial indicators of Chinese GDP often suggest that Beijing’s growth figures are exaggerated. This column uses nighttime light as a proxy to estimate Chinese GDP growth. Since 2012, the authors’ estimate is never appreciably lower, and is in many years higher, than the GDP growth rate reported in the official statistics. While not ruling out the risk of future turmoil, the analysis presents few immediate indications that Chinese growth is being systematically overestimated.
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july 2017 by nhaliday
The Iran-Saudi Arabia Conflict Explained in Three Maps – LATE EMPIRE
As you can see, a high percentage of Saudi oil happens to be in the Shi’a-populated areas of their country. Saudi Arabia’s rulers are ultraconservative religious authoritarians of the Sunni conviction who unabashedly and colorfully display their interpretation of the Islamic religion without compromise. Naturally, such a ruling caste maintains a persistent paranoia that their Shi’a citizens will defect and take the oil under their feet with them with the assistance of the equally ultraconservative, ambitious, and revolutionary Shi’a Iran.

The American “restructuring” of the Iraqi political map and subsequent formation of a Shi’a-led government in Baghdad has created a launching pad for the projection of Iranian influence into Saudi territory.

So that’s the conflict in a nutshell.
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july 2017 by nhaliday

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