system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do some websites (eg, USAtoday, Facebook etc) send my cpu into overdrive?
gpt
Unlike most websites you see Facebook isn't static. Static means that you download the contents of the page, and those do not change (like most news articles you read online, for example). However Facebook has a lot of code on its page that tries to keep the page updated in real time (downloading notifications, new wall posts and messages continuously). This is what uses probably uses your CPU.