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What is the meaning of “non temporal” memory accesses in x86

...to be seen by other processors in a timely fashion. When data is produced and not (immediately) consumed again, the fact that memory store operations read a full cache line first and then modify the cached data is detrimental to performance. This operation pushes data out of the caches which might ...
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Redis strings vs Redis hashes to represent JSON: efficiency?

...e cases): Store the entire object as JSON-encoded string in a single key and keep track of all Objects using a set (or list, if more appropriate). For example: INCR id:users SET user:{id} '{"name":"Fred","age":25}' SADD users {id} Generally speaking, this is probably the best method in most cas...
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Execution of Python code with -m option or not

... When you use the -m command-line flag, Python will import a module or package for you, then run it as a script. When you don't use the -m flag, the file you named is run as just a script. The distinction is important when you try to run a package. T...
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How to pretty-print a numpy.array without scientific notation and with given precision?

...printoptions to set the precision of the output: import numpy as np x=np.random.random(10) print(x) # [ 0.07837821 0.48002108 0.41274116 0.82993414 0.77610352 0.1023732 # 0.51303098 0.4617183 0.33487207 0.71162095] np.set_printoptions(precision=3) print(x) # [ 0.078 0.48 0.413 0.83 ...
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What is more efficient? Using pow to square or just multiply it with itself?

What of these two methods is in C more efficient? And how about: 7 Answers 7 ...
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Move entire line up and down in Vim

...++, I can use Ctrl + Shift + Up / Down to move the current line up and down. Is there a similar command to this in Vim? I have looked through endless guides, but have found nothing. ...
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C++ valarray vs. vector

I like vectors a lot. They're nifty and fast. But I know this thing called a valarray exists. Why would I use a valarray instead of a vector? I know valarrays have some syntactic sugar, but other than that, when are they useful? ...
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Declaring abstract method in TypeScript

...The name property is marked as protected. This was added in TypeScript 1.3 and is now firmly established. The makeSound method is marked as abstract, as is the class. You cannot directly instantiate an Animal now, because it is abstract. This is part of TypeScript 1.6, which is now officially live....
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GIT clone repo across local file system in windows

.../<path> For example, if your main machine has the IP 192.168.10.51 and the computer name main, and it has a share named code which itself is a git repository, then both of the following commands should work equally: git clone file:////main/code git clone file:////192.168.10.51/code If the...
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What are the differences between “=” and

What are the differences between the assignment operators = and <- in R? 7 Answers ...