Object identification is very slow

The object identification tool doesn't usually take too long for me, but manually mapping objects is VERY time consuming.  When I use the Object Browser, and expand successive levels of objects it become slower and slower with every level I drill down within.  Sometimes expanding the various levels takes a minute or two.  This has occurred regardless of version (14.x or 15.x) and I also tend to agree that as the project suite has grown it lags more.  We are using React and NPM, which add in a lot of layers of objects within the page, it isn't basic HTML drop downs but instead layers and layers of DIVs.