We have 2 developers using CW 10.1. One is using a Win 7 32 bit machine and the other a Win7 64 bit machine. Both have permanent professional licenses located on their c: drives.
The 32 bit machine compliles a Kinetis project in around 15 seconds and downloads it using a Multilink Universal in around 10 seconds. The 64 bit machine takes around 15 minutes to compile and download the same project.
The project is located on a network drive that both pc's can access (obviously not at the same time).