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How does push notification technology work on Android?
...rk card is polling whether the router has redirected the packet to it. The CPU is polling whether the network card has raised an interrupt. It's all about how to poll efficiently.
– Tuupertunut
Jan 13 '19 at 3:01
...
How do I increase the RAM and set up host-only networking in Vagrant?
...
To increase the memory or CPU count when using Vagrant 2, add this to your Vagrantfile
Vagrant.configure("2") do |config|
# usual vagrant config here
config.vm.provider "virtualbox" do |v|
v.memory = 1024
v.cpus = 2
end
e...
What is the purpose of the “final” keyword in C++11 for functions?
...s is that for any such virtual object (assuming 64-bits on a typical Intel CPU) the pointer alone eats up 25% (8 of 64 bytes) of a cache line. In the kind of applications I enjoy to write, this hurts very badly. (And from my experience it is the #1 argument against C++ from a purist performance poin...
What is the direction of stack growth in most modern systems?
... from my big honkin' System z at work to a puny little wristwatch.
If the CPU provides any kind of choice, the ABI / calling convention used by the OS specifies which choice you need to make if you want your code to call everyone else's code.
The processors and their direction are:
x86: down.
SP...
Long list of if statements in Java
... boilerplate, but it won't get any shorter..)
3) you will save any wasted cpu cycles by going through a long list of if's or calculating hashCodes and doing lookups.
edit:
if you don't have enums but strings as source, just use Command.valueOf(mystr).exec() to call the exec method.
note that you ...
LINQ To Entities does not recognize the method Last. Really?
...u pointed out, it could bring back thousands of records and waste loads of CPU materialising objects that will never get used)
Again, I would not recommend doing this second, but it does help illustrate the difference between where and when the LINQ expression is executed.
...
How do you implement a Stack and a Queue in JavaScript?
...have a really good reason for it... while it might seem logically correct, CPUs don't operate according to human abstractions. Iterating over a datastructure that has pointers all over the place will result in cache misses in the CPU, unlike a sequential array which is highly efficient. blog.davidec...
What is difference between sjlj vs dwarf vs seh?
...looking for? Browse other questions tagged c++ compiler-construction mingw cpu-architecture mingw-w64 or ask your own question.
你以为发传单真的这么简单吗?（提升成功率干货） - 更多技术 - 清泛网 - 专...
...的，时而吆喝、时而蹿到你面前，俨然游戏关主。
那么问题来了：面对传单夹击，到底要肿么办？
道德帝一定会说：接一下传单又不会死！人家发传单那么辛苦>>>
曾经姐也秉着自以为体贴的心态，一路上来者不拒接下成沓广...
How can I generate a unique ID in Python? [duplicate]
...dom library :)
1 million id per second ?... on a Intel(R) Core(TM)2 CPU 6400 @ 2.13GHz, you get :
>>> timeit.timeit(uniqueid,number=40000)
1.0114529132843018
an average of 40000 id/second
"""
mynow=datetime.now
sft=datetime.strftime
# store old dat...