maybe by itself but imagine 20 or so people waving it around, along with a bunch of other guns (probably also his high poly as hell stuff), plus a build, plus emitters, plus probably vehicles.
My laptop has never once lagged from these weapons. Key word. LAPTOP.
If a portable, unmodified, $500 system can handle it, your computer should be able to as well. If not, there's obviously something wrong with it.