Each datatemplate in my WPF ItemsControl contains FIVE custom bindable richtextbox controls. It is a data-driven app that for authoring multiple-choice questions --> The question and four answer choices must all support: 1) Spell check 2) Rich formatting (otherwise I'd use regular textboxes) The spell check object in .NET 4 has a Frie...
Inspired by Apple's LazyTables sample, I've just built myself a class called ImageLoader. It's agonizingly clever of me. And as is often the case when I'm agonizingly clever, I'm up against the limits of my wisdom about how to handle the memory of this object. The thing gets instantiated from a UIViewController subclass inside viewDidLo...
More generally, does anyone know where the way APC works internally is documented? ...
Hello, I have a newbie question about the following: - (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section { NSArray *anArray; anArray = [dictionary objectForKey: [NSString stringWithFormat:@"%d", section]]; //here dictionary is of type NSDictionary, initialized in another place. An...
I'm all about performance these days cause I'm developing my first game engine. I'm no c++ expert but after some research I discovered the importance of the cache and the memory alignment. Basically what I found is that it is recommended to have memory well aligned specially if you need to access them together, for example in a loop. N...
Is there a reliable way to learn that a memory page or a range of pages belongs to a specific DLL inside the address space of a process? ...
In terms of memory management, memory footprint and ease of developer use what would be the best practice for creating helper methods for a custom entity object. So I have my object and I need a get, save, get history, maybe even a find method. The three options would be: Include the methods in the object themselves (get would be non...
I'm trying to find a good metaphor to explain memory allocation, initialization and freeing in c to a non technical audience. I've heard pass-by-reference/value talked about quite well with postal service usage, but not so much for allocation/deallocation. So for I've thought about using the idea of renting a space might work, but I won...
We are adding AES 256 bit encryption to our server and client applications for encrypting the TCP/IP traffic containing sensitive information. We will be rotating the keys daily. Because of that, the keys will be stored in memory with the applications. Key distribution process: Each server and client will have a list of initial Key E...
I am noticing a surge in memory and the responsible caller as listed in instruments is img_data_lock and responsible library is coregraphics. I have been reading that the issue relates to cached vs not cached image load ? (http://stackoverflow.com/questions/316236/uiimage-imagenamed-vs-uiimage-imagewithdata) Currently my app loads a se...
I am using this code inside a class to make a webbrowser control visit a website: void myClass::visitWeb(const char *url) { WCHAR buffer[MAX_LEN]; ZeroMemory(buffer, sizeof(buffer)); MultiByteToWideChar(CP_ACP, MB_ERR_INVALID_CHARS, url, strlen(url), buffer, sizeof(buffer)-1); VARIANT vURL; vURL.vt = VT_BSTR; vU...
I have situation in which i'm compelled to retrieve 30,000 records each to 2 datatables.I need to do some manipulations and insert into records into the SQL server in Manipulate(dt1,dt2) function.I have to do this in 15 times as you can see in the for loop.Now I want to know what would be the effective way in terms of memory usage.I've u...
I know this question looks like a dupe: I checked and it's not In talking about NARC, the author of this blog says, "Personally, I like to immediately autorelease anything I NARC-ed, on the same line." This goes completely counter to all the examples I've seen on the Apple site and in books, where autorelease is only used when the objec...
Continuing the discussion from http://stackoverflow.com/questions/2902984/understanding-vs2010-c-parallel-profiling-results but more to the point: I have many threads that work in parallel (using Parallel.For/Each), which use many memory allocations for small classes. This creates a contention on the global memory allocator thread. Is...
Want to explore few memory managers for our product - boost, small object allocator as in loki and one memory manager available internally in our company. Before choosing one for our product, we want to explore all options with small prototype application which need not be similar to our application in terms of functionality. My object...
Regarding the black art of managing memory on iPhone OS devices: what do the different levels of memory warning mean. Level 1? Level 2? Does the dial go to 11? Context: After an extensive memory stress testing period - including running my iPad app with the iPod music player app playing, I am inclined to ignore the random yet infrequent...
Okay, I know I must be doing something incredibly stupid here. Here's the sample code (which, when executed within a viewDidLoad block silently crashes... no error output to debug console). NSMutableArray *bs = [NSMutableArray arrayWithCapacity:10]; [bs addObject:[NSNumber numberWithInteger: 2]]; NSLog(@"%@", [bs count]); [bs release];...
Hi everyone, In my application, I get a memory warning of level 1 and then 2 after repeating some action (choosing a picture + processing) several times and then a crash. The leak tool doesn't show any leak. I'm also following the Allocations tool in Instruments and my Live Bytes are roughly 4 MB, overall I allocate 113 MB. At maximum ...
I've been looking into memory management a lot recently and have been looking at how events are managed, now, I'm seeing the explicit add/remove syntax for the event subscription. I think it's pretty simple, add/remove just allows me to perform other logic when I subscribe and unsubscribe? Am I getting it, or is there more to it? Also...
We have several different projects using ASP.NET and DevExpress ASPxGridView components. Throughout the development of these projects, several techniques on databinding have been used and we're now finding that some of these projects are eating up all the memory on the server. Originally, we were using a call to a stored procedure and ...