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Why is lazy evaluation useful?
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Lazy evaluation related to CPU the same way as garbage collection related to RAM. GC allows you to pretend that you have unlimited amount of memory and thus request as many objects in memory as you need. Runtime will automatically reclaim unusable obje...
MemoryCache does not obey memory limits in configuration
...blem, but it looks as if the thread of the MemoryCache does not get enough CPU time for cleaning, while many new elements are added.
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Efficiency of premature return in a function
... decide what is better a priori unless he has an intimate knowledge of the CPU architecture.
– fortran
Oct 25 '11 at 9:26
3
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What is an example of the simplest possible Socket.io example?
...may take a few minutes depending on the speed of your network connection / CPU / etc. To check that everything went as planned, you can look at the package.json file again.
$ cat package.json
{
"dependencies": {
"express": "~4.9.8",
"socket.io": "~1.1.0"
}
}
Create a file called serve...
How the single threaded non blocking IO model works in Node.js
...iting for network or disk (database / sockets) and the logic is not really CPU intensive - that is to say: this works well for IO-bound workloads.
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Casting vs using the 'as' keyword in the CLR
...ast:2135, Is And As:2145, As And null check: 1961,specs: OS:Windows Seven, CPU:i5-520M, 4GB of DDR3 1033 ram, benchmark on array of 128,000,000 items.
– Behrooz
Jun 25 '10 at 13:32
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What's the point of having pointers in Go?
... reasons. Pointers allow control over memory layout (affects efficiency of CPU cache). In Go we can define a structure where all the members are in contiguous memory:
type Point struct {
x, y int
}
type LineSegment struct {
source, destination Point
}
In this case the Point structures are em...
How slow are .NET exceptions?
...are implemented as Win32 SEH exceptions, so some will even pass the ring 0 CPU boundary!
Obviously in the real world, you'll be doing a lot of other work so the odd exception will not be noticed at all, but if you use them for program flow expect your app to be hammered. This is another example of ...
What are the dangers when creating a thread with a stack size of 50x the default?
...d the local variables in a method. Minus the ones that can be stored in a CPU register, you can ignore that since there are so few of them.
Increasing the stack size doesn't accomplish anything, you'll just reserve a bunch of address space that will never be used. There is no mechanism that can e...
Is there a REAL performance difference between INT and VARCHAR primary keys?
...oncerns in comments.
The setup was as follows:
Intel® Core™ i7-7500U CPU @ 2.70GHz × 4
15.6 GiB RAM, of which I ensured around 8 GB was free during the test.
148.6 GB SSD drive, with plenty of free space.
Ubuntu 16.04 64-bit
MySQL Ver 14.14 Distrib 5.7.20, for Linux (x86_64)
The tables:
c...