This question already has an answer here:
I'm running an i7 quad core with 16gb ram and an SSD. My proc maxes out at 100% routinely, and sometimes my ram goes into swap. This happens with Gnome or Unity. My laptop runs arch, and I'm seriously thinking of jumping ship, even if installing arch is a massive pita.
The 'top' command shows a process called "Web Content". That and systemd-resolve, and occasionally dnsmasq are gunking up my CPU resources. What do I do?