... linux machines) but a lot of the times BGAVE fails because the fork can't allocate memory. Many times the fork fails to allocate memory (although the machine has enough RAM available) because of a conflicting optimization by the OS. As can be read from Redis FAQ: Redis background saving schema rel...

...programs; program A which reads in a 1MB file into a buffer creating with malloc, and program B which mmaps the 1MB file into memory. If the operating system has to swap part of A's memory out, it must write the contents of the buffer to swap before it can reuse the memory. In B's case any unmodif...

...Calendar currentCalendar]; // Create the NSDates NSDate *date1 = [[NSDate alloc] init]; NSDate *date2 = [[NSDate alloc] initWithTimeInterval:theTimeInterval sinceDate:date1]; // Get conversion to months, days, hours, minutes unsigned int unitFlags = NSHourCalendarUnit | NSMinuteCalendarUnit | NSD...

... What about passing dynamically allocated arrays to functions in C++? In C11 standard it can be done for statically and dynamically allocated arrays like that fn(int col,int row, int array[col][row]): stackoverflow.com/questions/16004668/… I have made the...

...me figuring out that if the class definition is in a header file, then the allocation of the static variable should be in the implementation file, not the header. – shanet Jul 14 '12 at 3:06 ...

...it with an example: UIViewController *viewController = [[UIViewController alloc] init]; viewController.view.backgroundColor = [UIColor redColor]; UINavigationController *mainNavigationController = [[UINavigationController alloc] initWithRootViewController:viewController]; Here you are not setting...

...rence count, and a semantic copy of a Vec<T> involves creating a new allocation, and then semantically copying each stored element from the old to the new. These can be deep copies (e.g. Vec<T>) or shallow (e.g. Rc<T> doesn't touch the stored T), Clone is loosely defined as the sma...

...hich can cause an exception. Generally, there is no difference whether you allocate memory (work with strings in C++ manner) in the constructor of the exception or just before throwing - std::bad_alloc exception can be thrown before the one which you really want. So, a buffer allocated on the stack ...

... the bitmapOriginal with a radius of 8 and save it in bitmapOriginal final Allocation input = Allocation.createFromBitmap(rs, bitmapOriginal); //use this constructor for best performance, because it uses USAGE_SHARED mode which reuses memory final Allocation output = Allocation.createTyped(rs, input...

...now if the function will throw. For a reminder, any kind of dynamic memory allocation may throw. Okay, now on to the possible optimizations. The most obvious optimizations are actually performed in the libraries. C++11 provides a number of traits that allows knowing whether a function is noexcep...