Merge pull request #990 from filecoin-project/feat/no-unseal-bench

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") {
@@ -218,17 +222,18 @@ func main() {
 
 				verifySeal := time.Now()
 
+				if !c.Bool("skip-unseal") {
 					log.Info("Unsealing sector")
 					rc, err := sb.ReadPieceFromSealedSector(1, 0, dataSize, ticket.TicketBytes[:], commD[:])
 					if err != nil {
 						return err
 					}
 
-				unseal := time.Now()
-
 					if err := rc.Close(); err != nil {
 						return err
 					}
+				}
+				unseal := time.Now()
 
 				sealTimings = append(sealTimings, SealingResult{
 					AddPiece:  addpiece.Sub(start),