chore(test): use testing.B.Loop (#13385)

Author: JacksonEi

CHANGELOG.md

@@ -13,6 +13,7 @@
 - chore(deps): update of quic-go to v0.54.1 and go-libp2p to v0.43.0 ([filecoin-project/lotus#13361](https://github.com/filecoin-project/lotus/pull/13361))
 - feat(spcli): add a `deposit-margin-factor` option to `lotus-miner actor new` and `lotus-shed miner create` so the sent deposit still covers the on-chain requirement if it rises between lookup and execution
 - feat(cli): lotus evm deploy prints message CID ([filecoin-project/lotus#13378](https://github.com/filecoin-project/lotus/pull/13378))
+- chore: update benchmark tests to use testing.B.Loop for improved performance ([filecoin-project/lotus#13385](https://github.com/filecoin-project/lotus/pull/13385))
 - fix(eth): properly return vm error in all gas estimation methods ([filecoin-project/lotus#13389](https://github.com/filecoin-project/lotus/pull/13389))
 - chore: all actor cmd support --actor ([filecoin-project/lotus#13391](https://github.com/filecoin-project/lotus/pull/13391))
 

chain/store/store_test.go

@@ -84,7 +84,7 @@ func BenchmarkGetRandomness(b *testing.B) {
 
 	b.ResetTimer()
 
-	for i := 0; i < b.N; i++ {
+	for b.Loop() {
 		_, err := cg.StateManager().GetRandomnessFromTickets(context.TODO(), crypto.DomainSeparationTag_SealRandomness, 500, nil, last.Key())
 		if err != nil {
 			b.Fatal(err)

chain/sync_test.go

@@ -899,7 +899,7 @@ func TestMatchedNoncesRobustID(t *testing.T) {
 }
 
 func BenchmarkSyncBasic(b *testing.B) {
-	for i := 0; i < b.N; i++ {
+	for b.Loop() {
 		runSyncBenchLength(b, 100)
 	}
 }

chain/types/blockheader_test.go

@@ -129,7 +129,7 @@ func BenchmarkBlockHeaderMarshal(b *testing.B) {
 	b.ReportAllocs()
 
 	buf := new(bytes.Buffer)
-	for i := 0; i < b.N; i++ {
+	for b.Loop() {
 		buf.Reset()
 		if err := bh.MarshalCBOR(buf); err != nil {
 			b.Fatal(err)