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Why does changing 0.1f to 0 slow down performance by 10x?
...p and resolve them using microcode.
If you print out the numbers after 10,000 iterations, you will see that they have converged to different values depending on whether 0 or 0.1 is used.
Here's the test code compiled on x64:
int main() {
double start = omp_get_wtime();
const float x[16]...
How to decide when to use Node.js?
...de.js in this case
It is very lightweight and fast. There has been over 200000 visits on this website in three weeks and minimal server resources has been able to handle it all.
The counter is really easy to make to be real time.
Node.js was easy to configure.
There are lots of modules available f...
Can I use view pager with views (not with fragments)
...32dp"
android:textStyle="italic"
android:background="#FFFFF000"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#FFFF00F0">
<TextView
android:id="@+id/txvLeft"
...
How exactly does CMake work?
...KLOC, maybe up to 100KLOG, using CMake seems a little bit like using a 100,000 dollar forestry tree removal machine to remove weeds from your 2 foot by 2 foot flower garden. (By the way, if you've never seen such a machine, you should look for one on youtube, they're amazing)
If your build system ...
Non-Relational Database Design [closed]
... single-user applications.
For example, you can usually read a file of 10,000 records AND sort it on a field in less than half a second, an acceptable response time.
Of course, there are reasons to use a database instead of a flat file -- relational operations, data integrity, multiuser capability...
MongoDB: Combine data from multiple collections into one..how?
...e076cdf52e541d9d29"),
"isbn": "978-3-16-148999-9",
"copies_sold": 1000
}
To merge both collections is just a matter of using $lookup in the following way:
db.books.aggregate([{
$lookup: {
from: "books_selling_data",
localField: "isbn",
foreignField:...
RESTful Authentication
...
answered Aug 23 '11 at 9:29
Arnaud BouchezArnaud Bouchez
39.9k33 gold badges6565 silver badges146146 bronze badges
...
How to detect if a script is being sourced
...othing really related...
You could even check that $SECONDS is close to 0.000, but that's ensure only manualy sourced cases...
You even could try to check for what's parent is:
Place this into your testfile.ksh:
ps $PPID
Than:
./testfile.ksh
PID TTY STAT TIME COMMAND
32320 pts/4 S...
What are good examples of genetic algorithms/genetic programming solutions? [closed]
...nerations of this, I ended up with a population of genes that could turn $5000 into an average of about $10000 with no chance of death/brokeness (on the historical data, of course).
Unfortunately, I never got the chance to use this system live, since my boss lost close to $100,000 in less than 3 mo...
Why are joins bad when considering scalability?
... its knees in production. I have seen queries that run to the order of 100,000 times faster simply by adding indexes. And that's arbitrary indexes without even doing any in-depth data analysis to determine the best mix for leftmost prefix matching.
– Duncan
Apr...