core/types: add benchmark

Author: cuiweixie

core/types/transaction_signing_test.go

@@ -25,6 +25,7 @@ import (
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/params"
+	"github.com/ethereum/go-ethereum/params/forks"
 	"github.com/ethereum/go-ethereum/rlp"
 )
 
@@ -188,3 +189,14 @@ func createTestLegacyTxInner() *LegacyTx {
 		Data:     nil,
 	}
 }
+
+func Benchmark_modernSigner_Equal(b *testing.B) {
+	signer1 := newModernSigner(big.NewInt(1), forks.Amsterdam)
+	signer2 := newModernSigner(big.NewInt(1), forks.Amsterdam)
+
+	for b.Loop() {
+		if !signer1.Equal(signer2) {
+			b.Fatal("expected signers to be equal")
+		}
+	}
+}