add a flag for bench to not run unseal

cmd/lotus-bench/main.go

@@ -89,6 +89,10 @@ func main() {
 				Name:  "json-out",
 				Usage: "output results in json format",
 			},
+			&cli.BoolFlag{
+				Name:  "skip-unseal",
+				Usage: "skip the unseal portion of the benchmark",
+			},
 		},
 		Action: func(c *cli.Context) error {
 			if c.Bool("no-gpu") {
@@ -218,18 +222,19 @@ func main() {
 
 				verifySeal := time.Now()
 
-				log.Info("Unsealing sector")
+				if !c.Bool("skip-unseal") {
-				rc, err := sb.ReadPieceFromSealedSector(1, 0, dataSize, ticket.TicketBytes[:], commD[:])
+					log.Info("Unsealing sector")
-				if err != nil {
+					rc, err := sb.ReadPieceFromSealedSector(1, 0, dataSize, ticket.TicketBytes[:], commD[:])
-					return err
+					if err != nil {
-				}
+						return err
+					}
 
+					if err := rc.Close(); err != nil {
+						return err
+					}
+				}
 				unseal := time.Now()
 
-				if err := rc.Close(); err != nil {
-					return err
-				}
-
 				sealTimings = append(sealTimings, SealingResult{
 					AddPiece:  addpiece.Sub(start),
 					PreCommit: precommit.Sub(addpiece),