Will HTC BlinkFeed use up too much power and memory?

HTC BlinkFeed is optimized to work well on your phone without draining your battery or taking too much memory or RAM.

Even when you've set HTC BlinkFeed to update frequently, your battery usage is about the same as when you're browsing stuff on your phone. Also, RAM usage of HTC BlinkFeed is low. This, of course, depends on the number of feed sources you have selected in HTC BlinkFeed.