This one is something that I can attribute to the Kelby media juggernaut. I did not discover this myself but, if you are a user of Lightroom CC and use either the HDR or the panorama functions, this could be of interest. One of my issues with them was that they took a while to bring up a preview. Once you had got this, the processing would work in the background.
It turns out, if you don’t need to tweak the settings and are happy with what you used previously, you can hold Shift and Ctrl and press either M for panorama or H for HDR and it will launch right into processing the whole thing in the background. You can set multiple versions off if you wish and they will all get to work out of sight while you do something else. While my feelings on the outcome of the processing are not universally great and I covered this in some previous posts, it does a reasonable job most of the time and this is an even better feature that is well concealed!