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Synchronization vs Lock
...r can there be barging? Method level synchronization ensures fair or FIFO allocation of the lock. Using
synchronized(foo) {
}
or
lock.acquire(); .....lock.release();
does not assure fairness.
If you have lots of contention for the lock you can easily encounter barging where newer requests ...
Why is there no Constant feature in Java?
...calling some method with side effects. final is somewhat similair to stack allocation of C++ in terms of refering to an object rather than a pointer, but that's all it is. This is ofcourse in addition to what dom0 already said.
– Tim
Mar 28 '16 at 18:22
...
PHP memory profiling
..., to see how much memory my data is using, and/or which function calls are allocating the most memory.
4 Answers
...
omp parallel vs. omp parallel for
...using separated parallel and for here. In short it can be used for dynamic allocation of OpenMP thread-private arrays before executing for cycle in several threads.
It is impossible to do the same initializing in parallel for case.
UPD:
In the question example there is no difference between single ...
Functional programming - is immutability expensive? [closed]
...his algorithm has a very poor cache locality. I don’t know whether smart allocators in modern functional programming languages can mitigate this – but on modern machines, cache misses have become a major performance killer.
What’s the conclusion? Unlike others, I wouldn’t say that quickso...
How does the new automatic reference counting mechanism work?
...bjects on different lines? Those statements even tell you on what line you allocated the object. This has been taken a step further and now can insert retain/release statements at the proper locations, better than most programmers, almost 100% of the time. Occasionally there are some weird instances...
Android activity life cycle - what are all these methods for?
...te
Stopped state
Starting state involves:
Creating a new Linux process, allocating new memory for the new UI objects, and setting up the whole screen. So most of the work is involved here.
Running state involves:
It is the activity (state) that is currently on the screen. This state alone handl...
How to play a local video with Swift?
...scussion Video Player
@code
self.videoPlayer = [[VideoPlayer alloc] initVideoPlayerWithURL:someURL playerView:self.playerView];
[self.videoPlayer prepareToPlay];
self.videoPlayer.delegate = self; //optional
//after when required play item
[self.vide...
When is it better to use String.Format vs string concatenation?
...ring via ToString(). Then the total length is computed and only one string allocated (with the total length). Finally, each string is copied into the resulting string via wstrcpy in some unsafe piece of code.
Reasons String.Concat is way faster? Well, we can all have a look what String.Format is do...
How to pass object with NSNotificationCenter
... question).
Class A (sender):
YourDataObject *message = [[YourDataObject alloc] init];
// set your message properties
NSDictionary *dict = [NSDictionary dictionaryWithObject:message forKey:@"message"];
[[NSNotificationCenter defaultCenter] postNotificationName:@"NotificationMessageEvent" object:ni...