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What is the difference between Trap and Interrupt?
...ted by the hardware (devices like the hard disk, graphics card, I/O ports, etc). These are asynchronous (i.e. they don't happen at predictable places in the user code) or "passive" since the interrupt handler has to wait for them to happen eventually.
You can also see a trap as a kind of CPU-intern...
How to detect idle time in JavaScript elegantly?
...idle " time in JavaScript?
My primary use case probably would be to pre-fetch or preload content.
38 Answers
...
Nodejs Event Loop
...output asynchronously. It handles file descriptors, data handlers, sockets etc. You can read more about it here here.
LibUv is an abstraction layer on the top of libeio , libev, c-ares ( for DNS ) and iocp (for windows asynchronous-io). LibUv performs, maintains and manages all the io and events in ...
Context switches much slower in new linux kernels
...you can do this by adding them to the GRUB_CMDLINE_LINUX_DEFAULT entry in /etc/default/grub and then running update-grub. The boot parameters to add are:
intel_idle.max_cstate=0 processor.max_cstate=0 idle=poll
Here are the gory details about what the three boot options do:
Setting intel_idle.ma...
What is the most ridiculous pessimization you've seen? [closed]
...ster, but it ends up being slower, as well as being buggy, unmaintainable, etc. What is the most ridiculous example of this that you've seen?
...
Execute and get the output of a shell command in node.js
...utput);
});
});
}
Usage
async function main() {
try {
const passwdContent = await execute("cat /etc/passwd");
console.log(passwdContent);
} catch (error) {
console.error(error.toString());
}
try {
const shadowContent = await execute("cat /etc/shadow");
console...
What's the difference between a word and byte?
...e unit for a CPU. If you want to set/clear single bits, you first need to fetch the corresponding byte from memory, mess with the bits and then write the byte back to memory.
The word by contrast is biggest chunk of bits with which a processor can do processing (like addition and subtraction) at a ...
What is stability in sorting algorithms and why is it important?
...orithms are stable by nature like Insertion sort, Merge Sort, Bubble Sort, etc. And some sorting algorithms are not, like Heap Sort, Quick Sort, etc.
Background: a "stable" sorting algorithm keeps the items with the same sorting key in order. Suppose we have a list of 5-letter words:
peach
straw...
Controlling fps with requestAnimationFrame?
...
That's it, all the logic is handled internally.
Demo
var ctx = c.getContext("2d"), pTime = 0, mTime = 0, x = 0;
ctx.font = "20px sans-serif";
// update canvas with some information and animation
var fps = new FpsCtrl(12, function(e) {
ctx.clearRect(0, 0, c.width, c.height);
ctx.fil...
One SVN repository or many?
... = none # or read or write
auth-access = write
password-db = /var/svn/conf/passwd
authz-db = /var/svn/conf/authz
realm = Repos1 SVN Repository
File: /var/svn/conf/authz
[groups]
group_repos1_read = user1, user2
group_repos1_write = user3, user4
group_repos2_read = user1, user4
### Global Right f...