diff --git a/cl/cltypes/eth1_block.go b/cl/cltypes/eth1_block.go
index 083c8fa80..a31b1916a 100644
--- a/cl/cltypes/eth1_block.go
+++ b/cl/cltypes/eth1_block.go
@@ -160,6 +160,8 @@ func (b *Eth1Block) DecodeSSZ(buf []byte, version int) error {
 	b.Extra = solid.NewExtraData()
 	b.Transactions = &solid.TransactionsSSZ{}
 	b.Withdrawals = solid.NewStaticListSSZ[*types.Withdrawal](16, 44)
+	b.DataGasUsed = new(uint64)
+	b.ExcessDataGas = new(uint64)
 	b.version = clparams.StateVersion(version)
 	return ssz2.UnmarshalSSZ(buf, version, b.getSchema()...)
 }
@@ -181,7 +183,7 @@ func (b *Eth1Block) getSchema() []interface{} {
 		s = append(s, b.Withdrawals)
 	}
 	if b.version >= clparams.DenebVersion {
-		s = append(s, &b.DataGasUsed, &b.ExcessDataGas)
+		s = append(s, b.DataGasUsed, b.ExcessDataGas)
 	}
 	return s
 }
diff --git a/cl/spectest/tests_test.go b/cl/spectest/tests_test.go
index 09a7a4234..db4fe28c9 100644
--- a/cl/spectest/tests_test.go
+++ b/cl/spectest/tests_test.go
@@ -1,14 +1,11 @@
-//go:build spectest
-
-// once all tests are implemented, we can allow this test in the ci build path
-
 package spectest
 
 import (
-	"github.com/ledgerwatch/erigon/cl/transition"
 	"os"
 	"testing"
 
+	"github.com/ledgerwatch/erigon/cl/transition"
+
 	"github.com/ledgerwatch/erigon/cl/spectest/consensus_tests"
 
 	"github.com/ledgerwatch/erigon/spectest"
diff --git a/cl/transition/impl/eth2/operations.go b/cl/transition/impl/eth2/operations.go
index 29771769f..bc70a7e36 100644
--- a/cl/transition/impl/eth2/operations.go
+++ b/cl/transition/impl/eth2/operations.go
@@ -4,11 +4,12 @@ import (
 	"bytes"
 	"errors"
 	"fmt"
+	"reflect"
+	"time"
+
 	"github.com/ledgerwatch/erigon/cl/transition/impl/eth2/statechange"
 	"github.com/ledgerwatch/erigon/metrics/methelp"
 	"golang.org/x/exp/slices"
-	"reflect"
-	"time"
 
 	"github.com/ledgerwatch/erigon-lib/common"
 	"github.com/ledgerwatch/erigon/cl/cltypes/solid"
@@ -704,21 +705,43 @@ func processAttestation(s *state.BeaconState, attestation *solid.Attestation, ba
 }
 
 func verifyAttestations(s *state.BeaconState, attestations *solid.ListSSZ[*solid.Attestation], attestingIndicies [][]uint64) (bool, error) {
-	var err error
-	valid := true
+	indexedAttestations := make([]*cltypes.IndexedAttestation, 0, attestations.Len())
 	attestations.Range(func(idx int, a *solid.Attestation, _ int) bool {
-		indexedAttestation := state.GetIndexedAttestation(a, attestingIndicies[idx])
-		valid, err = state.IsValidIndexedAttestation(s.BeaconState, indexedAttestation)
-		if err != nil {
-			return false
-		}
-		if !valid {
-			return false
-		}
+		indexedAttestations = append(indexedAttestations, state.GetIndexedAttestation(a, attestingIndicies[idx]))
 		return true
 	})
 
-	return valid, err
+	return batchVerifyAttestations(s, indexedAttestations)
+}
+
+type indexedAttestationVerificationResult struct {
+	valid bool
+	err   error
+}
+
+// Concurrent verification of BLS.
+func batchVerifyAttestations(s *state.BeaconState, indexedAttestations []*cltypes.IndexedAttestation) (valid bool, err error) {
+	c := make(chan indexedAttestationVerificationResult, 1)
+
+	for idx := range indexedAttestations {
+		go func(idx int) {
+			valid, err := state.IsValidIndexedAttestation(s.BeaconState, indexedAttestations[idx])
+			c <- indexedAttestationVerificationResult{
+				valid: valid,
+				err:   err,
+			}
+		}(idx)
+	}
+	for i := 0; i < len(indexedAttestations); i++ {
+		result := <-c
+		if result.err != nil {
+			return false, err
+		}
+		if !result.valid {
+			return false, nil
+		}
+	}
+	return true, nil
 }
 
 func (I *impl) ProcessBlockHeader(s *state.BeaconState, block *cltypes.BeaconBlock) error {
diff --git a/cmd/caplin-regression/main.go b/cmd/caplin-regression/main.go
index ab114b4c5..7a3abb9c9 100644
--- a/cmd/caplin-regression/main.go
+++ b/cmd/caplin-regression/main.go
@@ -2,7 +2,8 @@ package main
 
 import (
 	"flag"
-	"net/http"
+
+	"github.com/ledgerwatch/erigon/turbo/debug"
 
 	"github.com/ledgerwatch/erigon/cl/cltypes"
 	"github.com/ledgerwatch/erigon/cl/phase1/forkchoice"
@@ -41,13 +42,7 @@ func main() {
 	)
 	if *pprof {
 		// Server for pprof
-		go func() {
-			log.Info("Serving pprof on localhost:6060")
-			if err := http.ListenAndServe("localhost:6060", nil); err != nil { //nolint:gosec
-				log.Error("Could not serve pprof", "err", err)
-			}
-
-		}()
+		debug.StartPProf("localhost:6060", true)
 	}
 
 	if err != nil {
diff --git a/go.mod b/go.mod
index be0113b96..aa102c281 100644
--- a/go.mod
+++ b/go.mod
@@ -14,7 +14,7 @@ require (
 require (
 	gfx.cafe/util/go/generic v0.0.0-20230502013805-237fcc25d586
 	github.com/99designs/gqlgen v0.17.32
-	github.com/Giulio2002/bls v0.0.0-20230507111335-fa36c339a11f
+	github.com/Giulio2002/bls v0.0.0-20230611172327-c0b9800e7b57
 	github.com/RoaringBitmap/roaring v1.2.3
 	github.com/VictoriaMetrics/fastcache v1.12.1
 	github.com/VictoriaMetrics/metrics v1.23.1
diff --git a/go.sum b/go.sum
index a3ae2eb52..17d8530d9 100644
--- a/go.sum
+++ b/go.sum
@@ -18,8 +18,8 @@ git.apache.org/thrift.git v0.0.0-20180902110319-2566ecd5d999/go.mod h1:fPE2ZNJGy
 github.com/99designs/gqlgen v0.17.32 h1:yX5On31oZ8I4dAfgZeeR/A8L9SWk+nD+cF8Aao4vmHs=
 github.com/99designs/gqlgen v0.17.32/go.mod h1:5j5Ak84e9FTYtH3aaNhK+FoYzXdUAY9CahQcWDqOwR8=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
-github.com/Giulio2002/bls v0.0.0-20230507111335-fa36c339a11f h1:7H8fhLJwlYAzzVUE1bQsQZjJBg8Rw+x5IZyb3i7PfZw=
-github.com/Giulio2002/bls v0.0.0-20230507111335-fa36c339a11f/go.mod h1:o6qWofeW8A1XImbo3eHbC/wXnw/dasu0YuHEtdrjYzw=
+github.com/Giulio2002/bls v0.0.0-20230611172327-c0b9800e7b57 h1:583GFQgWYOAz3dKqHqARVY3KkgebRcJtU4tzy+87gzc=
+github.com/Giulio2002/bls v0.0.0-20230611172327-c0b9800e7b57/go.mod h1:vwm1rY/WKYdwv5Ii5US2bZ3MQVcHadnev+1Ml2QYWFk=
 github.com/RoaringBitmap/roaring v0.4.7/go.mod h1:8khRDP4HmeXns4xIj9oGrKSz7XTQiJx2zgh7AcNke4w=
 github.com/RoaringBitmap/roaring v0.4.17/go.mod h1:D3qVegWTmfCaX4Bl5CrBE9hfrSrrXIr8KVNvRsDi1NI=
 github.com/RoaringBitmap/roaring v0.4.23/go.mod h1:D0gp8kJQgE1A4LQ5wFLggQEyvDi06Mq5mKs52e1TwOo=