Minimizing the stage 1 bitstream size is the ultimate goal of Tandem Configuration, and the use of bitstream compression aids in this effort. This option uses a multi-frame write technique to reduce the size of the bitstream and therefore the configuration time required. The amount of compression varies from design to design. When Tandem is selected, compression is turned on in the IP level constraints. This can be overridden in the user design constraints as desired. The following command can be used to enable or disable bitstream compression.
set_property BITSTREAM.GENERAL.COMPRESS <TRUE|FALSE> [current_design]