core/rawdb: add bench for decoding into rlpLogs

core/rawdb/accessors_chain.go

@@ -673,7 +673,8 @@ type storedReceiptRLP struct {
 }
 
 // ReceiptLogs is a barebone version of ReceiptForStorage which only keeps
-// the list of logs.
+// the list of logs. When decoding a stored receipt into this object we
+// avoid creating the bloom filter.
 type receiptLogs struct {
 	Logs []*types.Log
 }

core/rawdb/accessors_chain_test.go

@@ -857,3 +857,29 @@ func TestDeriveLogFields(t *testing.T) {
 		}
 	}
 }
+
+func BenchmarkDecodeRLPLogs(b *testing.B) {
+	// Encoded receipts from block 0x14ee094309fbe8f70b65f45ebcc08fb33f126942d97464aad5eb91cfd1e2d269
+	buf, err := ioutil.ReadFile("testdata/stored_receipts.bin")
+	if err != nil {
+		b.Fatal(err)
+	}
+	b.Run("ReceiptForStorage", func(b *testing.B) {
+		b.ReportAllocs()
+		var r []*types.ReceiptForStorage
+		for i := 0; i < b.N; i++ {
+			if err := rlp.DecodeBytes(buf, &r); err != nil {
+				b.Fatal(err)
+			}
+		}
+	})
+	b.Run("rlpLogs", func(b *testing.B) {
+		b.ReportAllocs()
+		var r []*receiptLogs
+		for i := 0; i < b.N; i++ {
+			if err := rlp.DecodeBytes(buf, &r); err != nil {
+				b.Fatal(err)
+			}
+		}
+	})
+}