Add debug printfs

pkg/diff2/compareconfig.go

@@ -7,6 +7,7 @@ import (
 
 	"github.com/StackExchange/dnscontrol/v4/models"
 	"github.com/StackExchange/dnscontrol/v4/pkg/prettyzone"
+	"github.com/StackExchange/dnscontrol/v4/pkg/printer"
 )
 
 /*
@@ -103,7 +104,9 @@ func NewCompareConfig(origin string, existing, desired models.Records, compFn Co
 		labelMap: map[string]bool{},
 		keyMap:   map[models.RecordKey]bool{},
 	}
+	printer.Printf("DEBUG: EXISTING:\n")
 	cc.addRecords(existing, true) // Must be called first so that CNAME manipulations happen in the correct order.
+	printer.Printf("DEBUG: DESIRED:\n")
 	cc.addRecords(desired, false)
 	cc.verifyCNAMEAssertions()
 	sort.Slice(cc.ldata, func(i, j int) bool {
@@ -215,6 +218,7 @@ func mkCompareBlobs(rc *models.RecordConfig, f func(*models.RecordConfig) string
 		}
 	}
 
+	// We do this to save memory. This assures the first return value uses the same memory as the second.
 	lenWithoutTTL := len(comp)
 	compFull := comp + fmt.Sprintf(" ttl=%d", rc.TTL)