Actually I just found this (independent post by another user):
I will try to poke around in librealsense and recompile but it would be really good if the precompiled binaries didn't ship with this issue.
Still curious if there may be other causes for this.
I remembered seeing a couple of reports about high CPU load with SDK 2.0, so did some research. This link may be of particular use to you.
Thanks. I will try to change some of the OpenMP stuff in librealsense and recompile.