I just installed the latest version of SQL Server Design Tools for Visual Studio 2017 (in order to get SSIS templates etc.)
Prior to this I could right-click a report in Solution Explorer and choose run, and this would deploy and run just that one report, but not the others in the project.
Now it seems that when I do the same, all reports (and data sources) in the project are being re-deployed every time I try this. It's not a huge problem, but I liked the old way, in case somebody knows of a little setting tweak in there - I've not found it yet in search.
Thankfully this bug was fixed in Reporting Services Projects 1.18.