User guide

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VPD and EVCD File Generation
This option affects performance and memory usage for larger designs
or longer runs.
Syntax:
+vpddrivers
+vpdnoports to Eliminate Storing Port Information
By default, VPD stores the port type for each signal. When you use
this option, the Hierarchy Browser views all signals as internal and
not connected to a port.
The +vpdnoports option causes VPD to eliminate storing port
information, which is used by the Hierarchy Browser to show whether
a signal is a port and if so its direction. This option to some extent
reduces simulation initialization time and memory usage for larger
designs.
Syntax:
+vpdnoports
+vpdnocompress to Bypass Data Compression
By default, VPD compresses data as it is written to the VPD file. You
can disable this feature by supplying the +vpdnocompress
command line option.
Syntax:
+vpdnocompress