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Why does GCC generate 15-20% faster code if I optimize for size instead of speed?
...cle (and I believe a version of this also appeared in CACM) shows how link order and OS environment size changes alone were sufficient to shift performance significantly. They attribute this to alignment of "hot loops".
This paper, titled "Producing wrong data without doing anything obviously wron...
Microsecond timing in JavaScript
...volve looping, you cannot gain access to the value of console.timeEnd() in order to add your timer results together. You can, but it get gets nasty because you have to inject the value of your iterating variable, such as i, and set a condition to detect if the loop is done.
Here is an example becau...
Does the C++ standard mandate poor performance for iostreams, or am I just dealing with a poor imple
...ostreams to OS-specific I/O APIs and custom buffer management does give an order of magnitude improvement.
4 Answers
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How do I create test and train samples from one dataframe with pandas?
... test_size=0.3)
Case 2: case of a very small datasets (<500 rows): in order to get results for all your lines with this cross-validation. At the end, you will have one prediction for each line of your available training set.
from sklearn.model_selection import KFold
kf = KFold(n_splits=10, ran...
write a shell script to ssh to a remote machine and execute commands
...ript and put your linux machines IPs, usernames and password in respective order. After that run that script. Thats it ! This script will install VLC in all systems.
#!/bin/bash
SCRIPT="cd Desktop; pwd; echo -e 'PASSWORD' | sudo -S apt-get install vlc"
HOSTS=("192.168.1.121" "192.168.1.122" "192.1...
ASP.Net MVC: How to display a byte array image from model
...
Great, I added a method on my model in order to re use it :public string GetBase64() { var base64 = Convert.ToBase64String(ContentImage); return String.Format("data:image/gif;base64,{0}", base64); }
– R...
What is the most robust way to force a UIView to redraw?
...answer with more details. Trying to force the drawing system to run out of order by calling methods the documentation explicitly says not to call is not robust. At best it is undefined behavior. Most likely it will degrade performance and drawing quality. At worst it could deadlock or crash.
...
What's the difference between equal?, eql?, ===, and ==?
...t: => true
Note that two arrays with the same elements in a different order are not equal, uppercase and lowercase versions of the same letter are not equal and so on.
When comparing numbers of different types (e.g., integer and float), if their numeric value is the same, == will return true....
Seeking clarification on apparent contradictions regarding weakly typed languages
...o". If the developer is wrong, then the runtime will throw an exception in order to protect type safety. If the developer wishes to break type safety or memory safety, they can do so by turning off the type safety system by making an "unsafe" block. In an unsafe block you can use pointer magic to tr...
Perl build, unit testing, code coverage: A complete working example
...age analysis, try this:
Build testcover
And you'll see something on the order of this:
t\HelloPerlBuildWorld....ok
All tests successful.
Files=1, Tests=18, 12 wallclock secs ( 0.00 cusr + 0.00 csys = 0.00 CPU)
cover
Reading database from D:/Documents and Settings/LeuchKW/workspace/HelloPerlBui...