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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
...
jquery find closest previous sibling with class
...ling without having to get all. I had a particularly long set that was too CPU intensive using prevAll().
var category = $('li.current_sub').prev('li.par_cat');
if (category.length == 0){
category = $('li.current_sub').prevUntil('li.par_cat').last().prev();
}
category.show();
This gets the firs...
What are bitwise operators?
...ut bit on the bottom line. So the answer to the above expression is 4. The CPU has done (in this example) 8 separate "AND" operations in parallel, one for each column.
I mention this because I still remember having this "AHA!" moment when I learned about this many years ago.
...
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 ...
Fastest way to convert Image to Byte array
...out compression artefacts, pick a lossless format. If you're worried about CPU resources, pick a format which doesn't bother compressing - just raw ARGB pixels, for example. But of course that will lead to a larger byte array.
Note that if you pick a format which does include compression, there's n...
How do I script a “yes” response for installing programs?
...
Be careful with yes as it is known to max out the CPU. stackoverflow.com/a/18164007/720665
– David Salamon
Aug 2 '16 at 9:44
...
When to use Task.Delay, when to use Thread.Sleep?
...
Or when you don't want to chew up CPU in a main loop.
– Eddie Parker
May 20 '14 at 21:23
5
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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...