There isn’t much overhead for malloc, so you are unlikely to achieve any run-time savings. There is, however, a good reason to implement an allocator on top of malloc, and that is to be able to trace memory leaks. For example, you can free all memory allocated by the program when it exits, and then … Read more
This is the list of facts I collected. Instead of GC the term memory (de)allocation seems to be more appropriate in this context. My principal information source is the blog of Loren (especially its comments) and this article from MATLAB Digest. Because of its orientation for numeric computing with possible large data sets, MATLAB does … Read more
This has been a big concern for some using Node.js, and there are good news. The new memory limit for V8 is now unknown (not tested) for 64bit and raised to as much as 32bit address space allows in 32bit environments. Read more here: http://code.google.com/p/v8/issues/detail?id=847
Memory level warnings are logged by SpringBoard. As an app developer you don’t need to care about it. Just responding to -{application}didReceiveMemoryWarning is enough. There are 4 levels of warnings (0 to 3). These are set from the kernel memory watcher, and can be obtained by the not-so-public function OSMemoryNotificationCurrentLevel(). typedef enum { OSMemoryNotificationLevelAny = … Read more
After extensive debugging i finely isolated the problem. Memory management of bds2006 Turbo C++ became corrupt after you try to call any delete for already deleted pointer. for example: BYTE *dat=new BYTE[10],*tmp=dat; delete[] dat; delete[] tmp; After this is memory management not reliable. (‘new’ can allocate already allocated space) Of course deletion of the same … Read more
Softwares run on the OS on a very simple premise – they require memory. The device OS provides it in the form of RAM. The amount of memory required may vary – some softwares need huge memory, some require paltry memory. Most (if not all) users run multiple applications on the OS simultaneously, and given … Read more
The difference is that an object will be deallocated as soon as there are no strong pointers to it. Even if weak pointers point to it, once the last strong pointer is gone, the object will be deallocated, and all remaining weak pointers will be zeroed out. Perhaps an example is in order. Imagine our … Read more
Rust does not have a garbage collector. Does Rust free up the memory of overwritten variables? Yes, otherwise it’d be a memory leak, which would be a pretty terrible design decision. The memory is freed when the variable is reassigned: struct Noisy; impl Drop for Noisy { fn drop(&mut self) { eprintln!(“Dropped”) } } fn … Read more
The autoreleasepool pattern is used in Swift when returning autorelease objects (created by either your Objective-C code or using Cocoa classes). The autorelease pattern in Swift functions much like it does in Objective-C. For example, consider this Swift rendition of your method (instantiating NSImage/UIImage objects): func useManyImages() { let filename = pathForResourceInBundle for _ in … Read more
Ensure you record your work in a reproducible script. From time-to-time, reopen R, then source() your script. You’ll clean out anything you’re no longer using, and as an added benefit will have tested your code.