Not sure what it is, but this has been pretty bad for the past year? My windows 10 PC has a i5-4670K CPU, using Chrome, and on Jumpgate it maxes out to 100% CPU as long as the tab is selected. Everything is 2 fps (exaggeration, but its dam slow). Even on non-jumpgate, my CPU is at 60%, which is decent, but the framerate drops to about 10-20 and I have no clue why. It used to run smooth as butter. Its been slower and slower on both my PC and my Laptop. Was nigh unusable on my PC the last time I tried it use it.