I believe the 2 analysis parameters you want to specify are:
1. restart=no // to force re-use of the previous DC solution if if the conditions have changed
2. prevvoppoint=yes // reuse the DC solution from a previous analysis (if available)
These parameters can both be set from the spectre simulation interface as part of the SP-analysis setup.
You also may try performing a component parameter sweep. This is assuming you are sweeping a design variable and that variable is controlling the parameter value of the matching component. This should also speed things up.