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• Memory read/write access efficiency

  - by wolfPack88

  I've heard conflicting information from different sources, and I'm not really sure which one to believe. As such, I'll post what I understand and ask for corrections. Let's say I want to use a 2D matrix. There are three ways that I can do this (at least that I know of). 1: int i; char **matrix; matrix = malloc(50 * sizeof(char *)); for(i = 0; i…

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• What are the benefits of Android way of "saving memory" - explicitly passing Context objects everywhere?

  - by Sarge Borsch

  Turned out, this question is not easy to formulate for me, but let's try. In Android, pretty much any UI object depends on a Context, and has defined lifetime. It also can destroy and recreate UI objects and even whole application process at any time, and so on. This makes coding asynchronous operations correctly not straightforward. (and…

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• Could it be more efficient for systems in general to do away with Stacks and just use Heap for memory management?

  - by Dark Templar

  It seems to me that everything that can be done with a stack can be done with the heap, but not everything that can be done with the heap can be done with the stack. Is that correct? Then for simplicity's sake, and even if we do lose a little amount of performance with certain workloads, couldn't it be better to just go with one standard…

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• Need help with memory leaks in RSS Reader

  - by Stilton

  I'm trying to write a simple RSS reader for the iPhone, and it appeared to be working fine, until I started working with Instruments, and discovered my App is leaking massive amounts of memory. I'm using the NSXMLParser class to parse an RSS feed. My memory leaks appear to be originating from the overridden delegate methods: -…

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• Need help with a possible memory management problem(leak) regarding NSMutableArray

  - by user309030

  Hi, I'm a beginner level programmer trying to make a game app for the iphone and I've encountered a possible issue with the memory management (exc_bad_access) of my program so far. I've searched and read dozens of articles regarding memory management (including apple's docs) but I still can't figure out what exactly is wrong…

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• Need help with a memory management problem in my game model

  - by user309030

  Hi, I'm a beginner level programmer trying to make a game app for the iphone and I've encountered a possible issue with the memory management (exc_bad_access) of my program so far. I've searched and read dozens of articles regarding memory management (including apple's docs) but I still can't figure out what exactly is wrong…

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• Do classes which have a vector has a member have memory issues

  - by user263766

  I am just starting out C++, so sorry if this is a dumb question. I have a class Braid whose members are vectors. I have not written an assignment operator. When I do a lot of assignments to an object of the type Braid, I run into memory issues :- 0 0xb7daff89 in _int_malloc () from /lib/libc.so.6 #1 0xb7db2583 in malloc…

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• allocating extra memory for a container class.

  - by sil3nt

  Hey there, I'm writing a template container class and for the past few hours have been trying to allocate new memory for extra data that comes into the container (...hit a brick wall..:| ) template <typename T> void Container<T>::insert(T item, int index){ if ( index < 0){ cout<<"Invalid…

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• Two NIC cards with the same metric - Internet traffic going out the wrong one

  - by bvanderw

  I have two NIC cards in my computer - one is connected to our corporate network and the Internet, the other is connected to a private LAN through a Linksys WRT54G. Both cards use DHCP. This was never an issue with Windows XP, but with Windows Vista (and Windows 7) the metric for the 0.0.0.0 route is the same (20), and…

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• Printing perforated business cards

  - by Gio Borje

  I have a Brother MFC 440CN printer with the paper loaded underneath it. The problem with my stack of perforated business cards is that I can't print double-sided. The printer pulls the paper out from under its paper tray below and rolls it through the top for printing. With perforated business cards, they paper breaks…

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• HP Envy 14, Ubuntu 10.10 and trouble with the graphics cards

  - by Carsten Gehling

  A few days ago I bought a HP Envy 14, containing 2 graphics card: An integrated Intel graphics card, and an ATI HD 5650. I've installed Ubuntu 10.10 32-bit on the machine. Most things work fine out of the box, but the graphics cards are giving me trouble. When booting, I get the message "failed to get i915 symbols,…

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• HP Envy 14, Ubuntu 10.10 and trouble with the graphics cards

  - by Carsten Gehling

  A few days ago I bought a HP Envy 14, containing 2 graphics card: An integrated Intel graphics card, and an ATI HD 5650. I've installed Ubuntu 10.10 32-bit on the machine. Most things work fine out of the box, but the graphics cards are giving me trouble. When booting, I get the message "failed to get i915 symbols,…

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• Any experience with SATA SAS Interposer Cards?

  - by korkman

  Driven by the current price difference between SATA and SAS disks on one side and the potentially bad behaviour of SATA disks in bigger storage arrays on the other side, I have found so-called SATA-to-SAS interposer cards. Advertised as "seamlessly adding SAS capabilities to existing SATA disk drives", I wonder if…

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• SQL Server 2008 (64-bit)

  - by Grace09

  I have transaction log backup failures randomly. SQL Server Log says 'Memory constraints resulted reduced backup/restore buffer sizes. Proceding with 6 buffers of size 64KB.', and the SQL Server Agent Error Log has quite a few errors like 'Unable to start Job Manager thread for job xxx', '[298] SQLServer Error:…

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• NSMutableString leaks on append or replaceOccurrencesOfString

  - by John

  Hello Folks, I know similar questions have been asked time and time again but I ask that you please bear with me as I cannot seem to find an answer that helps. My application has leaks that are driving me out of my mind. Actually, they are not reported as leaks using Leaks, but my net bytes in ObjectAlloc…

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• MKMapView Memory Leak in iPhone Application

  - by user255884

  I am working on an iPhone application which uses MKMapView and shows userlocation. I am getting memory leaks where leaked object is NSCFArray of size 128 Bytes, GeneralBlock-16, GenralBlock-8 when is set MKMapView's showUserLocation property as TRUE. If is set it as NO then i dont get this leak. Can anyone…

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• UIImagePicker and Memory Warning Level 1

  - by user262829

  Hello, Whenever I use a UIImagePicker to take a picker in my app, I get the following message in the debug console: Receive memory warning. Level=1 I am using the following code: imagePickerController = [[UIImagePickerController alloc] init]; imagePickerController.delegate = self; …

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• Better Flex memory profiling tools

  - by verveguy

  Does anyone know of any better tools that the Flex Builder Profiler? I've googled and googled to no avail. While the FB tools are OK for small apps / small leak situations, they're nowhere near adequate for wading through the thicket of object references that can arise in a large scale…

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• memory not freed in matlab?

  - by noam

  I am running a script that animates a plot (simulation of a water flow). After a while, I kill the loop by doing ctrl-c. After doing this several times I get the error: ??? Error: Out of memory. And after I start receiving that error, every call to my script will generate it. Now,…

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• iphone how to remove modal uiviewcontroller from memory

  - by Scott Pendleton

  I have a root UIViewController which has a property called webView. WebView is a UIViewController with a XIB that contains a UIWebView. From my root view I modally (is there any other way?) load the webView ViewController and set its URL, always to the same page. I discovered that…

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• Memory leak issue with UIImagePickerController

  - by Mustafa

  I'm getting memory leak with UIImagePickerController class. Here's how I'm using it: UIImagePickerController *picker = [[UIImagePickerController alloc] init]; picker.delegate = self; picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary; [self…

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• Android setImageURI out of memory error

  - by Improver

  I have a very small activity that must show an image. If picture is not very small (for example 1.12 Mb 2560x1920) it produces out of memory on change screen orientation. I tried getDrawable.setCallback(null) but no luck. Where am I wrong? public class…

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• Memory leak using NSMutableArray in RootViewController called from App Delegate

  - by Lauren Quantrell

  I've written code to restore the state of my app, but there's a memory leak in the NSMutableArray. I'm new to Xcode so I apologize if this is something trivial I have overlooked. Any help is appreciated. lq AppDelegate.m -…

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• free() on stack memory

  - by vidicon

  I'm supporting some c code on Solaris, and I've seen something weird at least I think it is: char new_login[64]; ... strcpy(new_login, (char *)login); ... free(new_login); My understanding is that since the variable is a…

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• Tuning OS X Virtual Memory

  - by dcolish

  I've noticed some really odd results form vm_stat on OSX 10.6. According to this, its barely hitting the cache. Searches of pretty much everywhere I could think of turn up little to explain why the rate is so low. I asked a…

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