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What makes JNI calls slow?
...trivial native methods, in 2010 I measured calls at an average 40 ns on my Windows desktop, and 11 ns on my Mac desktop. Unless you're making many calls, you're not going to notice.
That said, calling a native method can be slower than making a normal Java method call. Causes include:
Native meth...
UnicodeDecodeError when redirecting to file
...ic ubiquity of encodings with no more than 256 characters (ASCII, Latin-1, Windows-1252, Mac OS Roman,…): these encodings map a set of common characters to numbers between 0 and 255 (i.e. bytes); the relatively limited exchange of files before the advent of the web made this situation of incompati...
Should I be concerned about excess, non-running, Docker containers?
...oved.
You can test this by listing your docker containers in one terminal window:
watch -n1 'sudo ls -c /var/lib/docker/containers'
And then in another window run this command to run multiple docker containers that will all automatically exit after sleeping for up to 10 seconds.
for i in {1..10...
Set folder browser dialog start location
... the real RootFolder!
using System;
using System.Reflection;
using System.Windows.Forms;
namespace YourNamespace
{
public class RootFolderBrowserDialog
{
#region Public Properties
/// <summary>
/// The description of the dialog.
/// </summary>...
Single huge .css file vs. multiple smaller specific .css files? [closed]
... CodeKit (by the same guys):
http://incident57.com/codekit/
WinLess is a Windows GUI for comipiling LESS
http://winless.org/
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What does it mean when git says a file “needs update”?
... [git reset --hard HEAD] worked for me. I had committed from a Windows share drive, but my Ubuntu directory wouldn't reflect the commit I'd just made, even though it was the same folder (Z: mapped to /var/www/html/). After running this, [git status] and [git pull] both now show it's up-t...
Find running median from a stream of integers
...
These heaps grow without bound (i.e. a 100 element window sliding over 10 million elements would require the 10 million elements to all be stored in memory). See below for another answer using indexable skiplists that only requires the most recently seen 100 elements be kept...
What exactly do “u” and “r” string flags do, and what are raw string literals?
...h of them -- that's all. It also gained some popularity to express native Windows file paths (with backslashes instead of regular slashes like on other platforms), but that's very rarely needed (since normal slashes mostly work fine on Windows too) and imperfect (due to the "except" clause above).
...
Heroku error: “Permission denied (public key)”
...n Git Bash, but I dont know why the same steps do not work consistantly in windows cmd???
– cyber101
Jun 26 '14 at 17:48
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Is there a performance difference between a for loop and a for-each loop?
... it repeated a few million times - this was using Java 5 with jre1.6u10 on Windows in case anyone is interested.
While it at least seems to be so that the third one is the fastest, you really should ask yourself if you want to take the risk of implementing this peephole optimization everywhere in y...