diff --git a/beacon-chain/core/state/spectest/slot_processing_test.go b/beacon-chain/core/state/spectest/slot_processing_test.go
index bc0ac6a7d..947cb8741 100644
--- a/beacon-chain/core/state/spectest/slot_processing_test.go
+++ b/beacon-chain/core/state/spectest/slot_processing_test.go
@@ -10,7 +10,6 @@ import (
 	"github.com/prysmaticlabs/prysm/beacon-chain/core/helpers"
 	"github.com/prysmaticlabs/prysm/beacon-chain/core/state"
 	pb "github.com/prysmaticlabs/prysm/proto/beacon/p2p/v1"
-	"github.com/prysmaticlabs/prysm/shared/featureconfig"
 	"github.com/prysmaticlabs/prysm/shared/params/spectest"
 	"github.com/prysmaticlabs/prysm/shared/testutil"
 	"gopkg.in/d4l3k/messagediff.v1"
@@ -53,7 +52,6 @@ func runSlotProcessingTests(t *testing.T, config string) {
 			if err := ssz.Unmarshal(postBeaconStateFile, postBeaconState); err != nil {
 				t.Fatalf("Failed to unmarshal: %v", err)
 			}
-			beaconStateCopy := proto.Clone(beaconState).(*pb.BeaconState)
 			postState, err := state.ProcessSlots(context.Background(), beaconState, beaconState.Slot+uint64(slotsCount))
 			if err != nil {
 				t.Fatal(err)
@@ -63,24 +61,6 @@ func runSlotProcessingTests(t *testing.T, config string) {
 				diff, _ := messagediff.PrettyDiff(beaconState, postBeaconState)
 				t.Fatalf("Post state does not match expected. Diff between states %s", diff)
 			}
-
-			// Process slots and epoch with optimizations.
-			f := featureconfig.Get()
-			f.OptimizeProcessEpoch = true
-			featureconfig.Init(f)
-			if c := featureconfig.Get(); !c.OptimizeProcessEpoch {
-				t.Errorf("OptimizeProcessEpoch in FeatureFlags incorrect. Wanted true, got false")
-			}
-
-			postState, err = state.ProcessSlots(context.Background(), beaconStateCopy, beaconStateCopy.Slot+uint64(slotsCount))
-			if err != nil {
-				t.Fatal(err)
-			}
-
-			if !proto.Equal(postState, postBeaconState) {
-				diff, _ := messagediff.PrettyDiff(beaconState, postBeaconState)
-				t.Fatalf("Post state does not match expected. Diff between states %s", diff)
-			}
 		})
 	}
 }
diff --git a/beacon-chain/core/state/transition.go b/beacon-chain/core/state/transition.go
index 005473dc8..e3676c50a 100644
--- a/beacon-chain/core/state/transition.go
+++ b/beacon-chain/core/state/transition.go
@@ -288,18 +288,10 @@ func ProcessSlots(ctx context.Context, state *pb.BeaconState, slot uint64) (*pb.
 			return nil, errors.Wrap(err, "could not process slot")
 		}
 		if CanProcessEpoch(state) {
-			if featureconfig.Get().OptimizeProcessEpoch {
-				state, err = ProcessEpochPrecompute(ctx, state)
-				if err != nil {
-					traceutil.AnnotateError(span, err)
-					return nil, errors.Wrap(err, "could not process epoch with optimizations")
-				}
-			} else {
-				state, err = ProcessEpoch(ctx, state)
-				if err != nil {
-					traceutil.AnnotateError(span, err)
-					return nil, errors.Wrap(err, "could not process epoch")
-				}
+			state, err = ProcessEpochPrecompute(ctx, state)
+			if err != nil {
+				traceutil.AnnotateError(span, err)
+				return nil, errors.Wrap(err, "could not process epoch with optimizations")
 			}
 		}
 		state.Slot++
diff --git a/shared/featureconfig/config.go b/shared/featureconfig/config.go
index 253f6cf6b..51cd64397 100644
--- a/shared/featureconfig/config.go
+++ b/shared/featureconfig/config.go
@@ -31,7 +31,6 @@ type Flags struct {
 	InitSyncNoVerify         bool // InitSyncNoVerify when initial syncing w/o verifying block's contents.
 	SkipBLSVerify            bool // Skips BLS verification across the runtime.
 	EnableBackupWebhook      bool // EnableBackupWebhook to allow database backups to trigger from monitoring port /db/backup.
-	OptimizeProcessEpoch     bool // OptimizeProcessEpoch to process epoch with optimizations by pre computing records.
 	PruneFinalizedStates     bool // PruneFinalizedStates from the database.
 
 	// Cache toggles.
@@ -106,10 +105,6 @@ func ConfigureBeaconChain(ctx *cli.Context) {
 		log.Warn("Enabled BLS pubkey cache.")
 		cfg.EnableBLSPubkeyCache = true
 	}
-	if ctx.GlobalBool(OptimizeProcessEpoch.Name) {
-		log.Warn("Processing epoch with optimizations")
-		cfg.OptimizeProcessEpoch = true
-	}
 	if ctx.GlobalBool(pruneFinalizedStatesFlag.Name) {
 		log.Warn("Enabled pruning old finalized states from database.")
 		cfg.PruneFinalizedStates = true
diff --git a/shared/featureconfig/flags.go b/shared/featureconfig/flags.go
index 9bbb03329..4ef325fdf 100644
--- a/shared/featureconfig/flags.go
+++ b/shared/featureconfig/flags.go
@@ -68,11 +68,6 @@ var (
 		Name:  "enable-bls-pubkey-cache",
 		Usage: "Enable BLS pubkey cache to improve wall time of PubkeyFromBytes",
 	}
-	// OptimizeProcessEpoch optimizes process epoch.
-	OptimizeProcessEpoch = cli.BoolFlag{
-		Name:  "optimize-process-epoch",
-		Usage: "Process epoch with optimizations",
-	}
 	// Scatter scatters sequential processes to  multiple cores
 	pruneFinalizedStatesFlag = cli.BoolFlag{
 		Name:  "prune-finalized-states",
@@ -99,6 +94,11 @@ var (
 		Usage:  deprecatedUsage,
 		Hidden: true,
 	}
+	deprecatedOptimizeProcessEpoch = cli.BoolFlag{
+		Name:   "optimize-process-epoch",
+		Usage:  deprecatedUsage,
+		Hidden: true,
+	}
 	deprecatedScatterFlag = cli.BoolFlag{
 		Name:   "scatter",
 		Usage:  deprecatedUsage,
@@ -110,6 +110,7 @@ var deprecatedFlags = []cli.Flag{
 	deprecatedNoGenesisDelayFlag,
 	deprecatedEnableFinalizedBlockRootIndexFlag,
 	deprecatedScatterFlag,
+	deprecatedOptimizeProcessEpoch,
 }
 
 // ValidatorFlags contains a list of all the feature flags that apply to the validator client.
@@ -127,7 +128,6 @@ var BeaconChainFlags = append(deprecatedFlags, []cli.Flag{
 	InitSyncNoVerifyFlag,
 	NewCacheFlag,
 	SkipBLSVerifyFlag,
-	OptimizeProcessEpoch,
 	enableBackupWebhookFlag,
 	enableBLSPubkeyCacheFlag,
 	enableShuffledIndexCache,