For an application of its capabilities, multiFEED is a very compact program, loading in just a few megabytes of RAM, but the feed data it downloads can consume a significant amount of your handset's available RAM. The amount of memory multiFEED needs to run at any particular time depends on how many feeds you are subscribed to, how many articles are downloaded for each of those feeds, and the headline thumbnail settings you choose. Some examples:
These examples represent a particular combination of feeds at a specific instant in time, and so should only be taken to be a rough approximation of what you may see with your own settings, but they give an idea of how RAM usage is affected by the number of feeds you set up and how you display headline thumbnails (or don't).
multiFEED tries hard to minimize RAM usage. For instance, if you have "embedded thumbnails" turned on, each image converted to a thumbnail can be up to a few megabytes in size before conversion, but multiFEED only keeps the much smaller "converted" version in RAM. Even so, if you "max out" the feed slots and enable large thumbnails for all your feeds multiFEED can consume an unacceptably large percentage of your device's RAM. If you find multiFEED is making your handset sluggish or preventing other apps from running properly, here are some things you can do to mitigate the problem:
IMPORTANT: A serious memory management bug has been identified affecting every version of BlackBerry OS from 10.0 to at least 10.3.1. The WebView controls that multiFEED uses to display article bodies has a memory leak that gradually consumes more and more device RAM as articles are opened and closed. While the memory consumption is usually slow to increase, at random times it may jump 50-120MB in one go. After extended use of multiFEED memory usage has been seen to rise from 20-50MB initially to as much as 600MB or more. It is possible that memory consumption may even reach a level where the OS decides to shut the application down without warning to recover memory, although this hasn't actually been witnessed in the field. It is important to understand that this is not a multiFEED bug. The problem has been submitted to and confirmed by BlackBerry, and they have promised a future fix, but have not indicated when this might appear. WebViews are so fundamental to the operation of multiFEED that there is no way to work around this BlackBerry 10 bug. Until BlackBerry releases a fix, you might need to occasionally shut down and restart multiFEED to recover the excess wasted RAM.
UPDATE: BlackBerry has reported that this bug has NOT been fixed yet in OS version 10.3.2.
A future release of multiFEED will allow you to specify a limit to the number of article headlines which are loaded for a feed, and also filter the headlines on various criteria, so only the headlines (and thumbnails) you are actually interested in will be loaded, thereby reducing RAM usage.