Responsiveness issue IDE

SInce a day or two I’m experiencing a severe slow down of the IDE when not using top of the line hardware. When on my i7 power machine, it works in an acceptable way, but the dual core in my lab is hardly capable of opening a device without going into 90% CPU territory for almost 10-20 secs.
Was there a significant change in the IDE lately causing this ?

We’re using Chrome (latest)