GP-3527 Auto VT dupe function match speedup

Ghidra/Features/VersionTracking/src/main/java/ghidra/feature/vt/gui/actions/AutoVersionTrackingTask.java

@@ -464,13 +464,27 @@ private boolean applyDuplicateFunctionMatches(Collection<VTMatch> matches, TaskM
  continue;
  }
 
+ // if already matched or blocked skip it
+ if (match.getAssociation().getStatus() != VTAssociationStatus.AVAILABLE) {
+ continue;
+ }
+
  // Get a set of related matches from the set of all matches. These all have the same
  // instructions as each other but not necessarily the same operands.
  Set<VTMatch> relatedMatches = getRelatedMatches(match, matches, monitor);
 
- // remove related matches from the set of matches to process next time
+ // remove related matches from the copy of set of matches which gets checked 
+ // and skipped if not in the set
  removeMatches(copyOfMatches, relatedMatches);
 
+ if (relatedMatches.size() > 20) {
+ Msg.debug(this, "Too many related matches to process this match set " +
+ match.getSourceAddress());
+ continue;
+ }
+
+
+
  // remove any matches that have identical source functions - if more than one
  // with exactly the same instructions and operands then cannot determine a unique match
  Set<Address> sourceAddresses = getSourceAddressesFromMatches(relatedMatches, monitor);