add bench mark for bls sign and verify

lib/sigs/bls/bls_bench_test.go

@@ -0,0 +1,58 @@
+package bls
+
+import (
+	"crypto/rand"
+	"github.com/filecoin-project/go-address"
+	"testing"
+)
+
+func Benchmark_blsSigner_Sign(b *testing.B) {
+	signer := blsSigner{}
+	b.ResetTimer()
+	for i:=0;i<b.N;i++{
+		b.StopTimer()
+		pk, err := signer.GenPrivate()
+		if err != nil {
+			b.Error(err)
+		}
+		randMsg := make([]byte, 32)
+		rand.Read(randMsg)
+
+		b.StartTimer()
+		_, err = signer.Sign(pk, randMsg)
+		if err != nil {
+			b.Error(err)
+		}
+	}
+}
+
+func Benchmark_blsSigner_Verify(b *testing.B) {
+	signer := blsSigner{}
+	b.ResetTimer()
+	for i:=0;i<b.N;i++{
+		b.StopTimer()
+		priv, err := signer.GenPrivate()
+		if err != nil {
+			b.Error(err)
+		}
+		randMsg := make([]byte, 32)
+		rand.Read(randMsg)
+		sig, err := signer.Sign(priv, randMsg)
+		if err != nil {
+			b.Error(err)
+		}
+		pk, err := signer.ToPublic(priv)
+		if err != nil {
+			b.Error(err)
+		}
+		addr, err  := address.NewBLSAddress(pk)
+		if err != nil {
+			b.Error(err)
+		}
+		b.StartTimer()
+		err = signer.Verify(sig, addr, randMsg)
+		if err != nil {
+			b.Error(err)
+		}
+	}
+}