The runtime for connecting or disconnecting a collection of objects can vary significantly depending on which command line options are used.
disconnect_net: for disconnecting a large number of nets
or pins, when the list of netlist elements is already available as first-class objects,
the command line option -pinlist should be used instead of -objects. However, when the
netlist elements are only known by name (string), then -objects can be used and results
in Vivado automatically converting the strings into first-class objects. The -objects
forces the conversion into first-class objects even when first-class objects are passed
as argument.
connect_net: for faster runtime, the command line option
-dict should be favored as an alternative to -net_object_list but it requires a list of
net and pin/port object pairs
For example:
set myNetA [get_nets netA]
set myPin1 [get_pins pin1]
set myPin2 [get_pins pin2]
set myPin3 [get_pins pin3]
connect_net -dict { $myNetA $myPin1 $myNetA $myPin2 $myNetA $myPin3 }