test: faster block time (#3094)

* test: faster block time

* Faster block times

Author: alpe

test/e2e/evm_contract_bench_test.go

@@ -20,7 +20,6 @@ import (
 	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/crypto"
-	"github.com/ethereum/go-ethereum/ethclient"
 	"github.com/stretchr/testify/require"
 	collpb "go.opentelemetry.io/proto/otlp/collector/trace/v1"
 	tracepb "go.opentelemetry.io/proto/otlp/trace/v1"
@@ -43,6 +42,7 @@ import (
 func BenchmarkEvmContractRoundtrip(b *testing.B) {
 	workDir := b.TempDir()
 	sequencerHome := filepath.Join(workDir, "evm-bench-sequencer")
+	const blockTime = 5 * time.Millisecond
 
 	// Start an in-process OTLP/HTTP receiver to collect traces from ev-node.
 	collector := newOTLPCollector(b)
@@ -54,6 +54,7 @@ func BenchmarkEvmContractRoundtrip(b *testing.B) {
 		"--evnode.instrumentation.tracing_endpoint", collector.endpoint(),
 		"--evnode.instrumentation.tracing_sample_rate", "1.0",
 		"--evnode.instrumentation.tracing_service_name", "ev-node-bench",
+		"--evnode.node.block_time="+blockTime.String(),
 	)
 	defer cleanup()
 
@@ -100,8 +101,11 @@ func BenchmarkEvmContractRoundtrip(b *testing.B) {
 		err = client.SendTransaction(ctx, signedTxs[i])
 		require.NoError(b, err)
 
-		// 2. Wait for inclusion.
-		waitForReceipt(b, ctx, client, signedTxs[i].Hash())
+		// 2. Wait for inclusion with fast polling to reduce variance while avoiding RPC overload.
+		require.Eventually(b, func() bool {
+			receipt, err := client.TransactionReceipt(ctx, signedTxs[i].Hash())
+			return err == nil && receipt != nil
+		}, 2*time.Second, blockTime/2, "transaction %s not included", signedTxs[i].Hash().Hex())
 
 		// 3. Retrieve and verify.
 		result, err := client.CallContract(ctx, callMsg, nil)
@@ -221,15 +225,3 @@ func printCollectedTraceReport(b testing.TB, collector *otlpCollector) {
 	}
 	printTraceReport(b, "ev-node", spans)
 }
-
-// waitForReceipt polls for a transaction receipt until it is available.
-func waitForReceipt(t testing.TB, ctx context.Context, client *ethclient.Client, txHash common.Hash) *types.Receipt {
-	t.Helper()
-	var receipt *types.Receipt
-	var err error
-	require.Eventually(t, func() bool {
-		receipt, err = client.TransactionReceipt(ctx, txHash)
-		return err == nil && receipt != nil
-	}, 2*time.Second, 50*time.Millisecond, "transaction %s not included", txHash.Hex())
-	return receipt
-}