.

t/neo/marshal.go

@@ -1189,20 +1189,12 @@ func (p *FinishTransaction) NEOEncodedLen() int {
 	{
 		l := uint32(len(p.OIDList))
 		size += 12
-		for i := 0; uint32(i) < l; i++ {
-			a := &p.OIDList[i]
-			_ = a
-			size += 8
-		}
+		size += l * 8
 	}
 	{
 		l := uint32(len(p.CheckedList))
 		size += 4
-		for i := 0; uint32(i) < l; i++ {
-			a := &p.CheckedList[i]
-			_ = a
-			size += 8
-		}
+		size += l * 8
 	}
 	return int(size) + 0
 }
@@ -1362,11 +1354,7 @@ func (p *InvalidateObjects) NEOEncodedLen() int {
 	{
 		l := uint32(len(p.OidList))
 		size += 12
-		for i := 0; uint32(i) < l; i++ {
-			a := &p.OidList[i]
-			_ = a
-			size += 8
-		}
+		size += l * 8
 	}
 	return int(size) + 0
 }
@@ -1456,11 +1444,7 @@ func (p *AnswerGenerateOIDs) NEOEncodedLen() int {
 	{
 		l := uint32(len(p.OidList))
 		size += 4
-		for i := 0; uint32(i) < l; i++ {
-			a := &p.OidList[i]
-			_ = a
-			size += 8
-		}
+		size += l * 8
 	}
 	return int(size) + 0
 }
@@ -1506,11 +1490,7 @@ func (p *StoreObject) NEOEncodedLen() int {
 	{
 		l := uint32(len(p.Data))
 		size += 41
-		for i := 0; uint32(i) < l; i++ {
-			a := &p.Data[i]
-			_ = a
-			size += 1
-		}
+		size += l * 1
 	}
 	return int(size) + 17
 }
@@ -1666,11 +1646,7 @@ func (p *StoreTransaction) NEOEncodedLen() int {
 	{
 		l := uint32(len(p.OidList))
 		size += 4
-		for i := 0; uint32(i) < l; i++ {
-			a := &p.OidList[i]
-			_ = a
-			size += 8
-		}
+		size += l * 8
 	}
 	return int(size) + 0
 }
@@ -1815,11 +1791,7 @@ func (p *AnswerGetObject) NEOEncodedLen() int {
 	{
 		l := uint32(len(p.Data))
 		size += 49
-		for i := 0; uint32(i) < l; i++ {
-			a := &p.Data[i]
-			_ = a
-			size += 1
-		}
+		size += l * 1
 	}
 	return int(size) + 8
 }
@@ -1940,11 +1912,7 @@ func (p *AnswerTIDList) NEOEncodedLen() int {
 	{
 		l := uint32(len(p.TIDList))
 		size += 4
-		for i := 0; uint32(i) < l; i++ {
-			a := &p.TIDList[i]
-			_ = a
-			size += 8
-		}
+		size += l * 8
 	}
 	return int(size) + 0
 }
@@ -2017,11 +1985,7 @@ func (p *AnswerTIDListFrom) NEOEncodedLen() int {
 	{
 		l := uint32(len(p.TidList))
 		size += 4
-		for i := 0; uint32(i) < l; i++ {
-			a := &p.TidList[i]
-			_ = a
-			size += 8
-		}
+		size += l * 8
 	}
 	return int(size) + 0
 }
@@ -2100,11 +2064,7 @@ func (p *AnswerTransactionInformation) NEOEncodedLen() int {
 	{
 		l := uint32(len(p.OidList))
 		size += 5
-		for i := 0; uint32(i) < l; i++ {
-			a := &p.OidList[i]
-			_ = a
-			size += 8
-		}
+		size += l * 8
 	}
 	return int(size) + 0
 }
@@ -2520,11 +2480,7 @@ func (p *AddPendingNodes) NEOEncodedLen() int {
 	{
 		l := uint32(len(p.UUIDList))
 		size += 4
-		for i := 0; uint32(i) < l; i++ {
-			a := &p.UUIDList[i]
-			_ = a
-			size += 4
-		}
+		size += l * 4
 	}
 	return int(size) + 0
 }
@@ -2570,11 +2526,7 @@ func (p *TweakPartitionTable) NEOEncodedLen() int {
 	{
 		l := uint32(len(p.UUIDList))
 		size += 4
-		for i := 0; uint32(i) < l; i++ {
-			a := &p.UUIDList[i]
-			_ = a
-			size += 4
-		}
+		size += l * 4
 	}
 	return int(size) + 0
 }
@@ -2781,11 +2733,7 @@ func (p *ObjectUndoSerial) NEOEncodedLen() int {
 	{
 		l := uint32(len(p.OidList))
 		size += 28
-		for i := 0; uint32(i) < l; i++ {
-			a := &p.OidList[i]
-			_ = a
-			size += 8
-		}
+		size += l * 8
 	}
 	return int(size) + 0
 }
@@ -3398,11 +3346,7 @@ func (p *PartitionCorrupted) NEOEncodedLen() int {
 	{
 		l := uint32(len(p.CellList))
 		size += 8
-		for i := 0; uint32(i) < l; i++ {
-			a := &p.CellList[i]
-			_ = a
-			size += 4
-		}
+		size += l * 4
 	}
 	return int(size) + 0
 }

t/neo/protogen.go

@@ -166,6 +166,20 @@ var basicTypes = map[types.BasicKind]basicCodec {
 	types.Float64:	{8, "float64_NEOEncode(%v, %v)", "float64_NEODecode(%v)"},
 }
 
+// does a type have fixed wire size and what it is
+func typeSizeFixed(typ types.Type) (wireSize int, ok bool) {
+	switch u := typ.Underlying().(type) {
+	case *types.Basic:
+		basic, ok := basicTypes[u.Kind()]
+		if ok {
+			return basic.wireSize, ok
+		}
+	}
+
+	// not matched above - not fixed
+	return 0, false
+}
+
 
 // Buffer + bell & whistles
 type Buffer struct {
@@ -325,6 +339,10 @@ func (e *encoder) genSlice(path string, typ *types.Slice, obj types.Object) {
 	}
 	e.n = 0
 	// TODO if size(item)==const - size update in one go
+	elemSize, ok := typeSizeFixed(typ.Elem())
+	if e.SizeOnly && ok {
+		e.emit("size += l * %v", elemSize)
+	} else {
 		e.emit("for i := 0; uint32(i) <l; i++ {")
 		e.emit("a := &%s[i]", path)
 		codegenType("(*a)", typ.Elem(), obj, e)
@@ -335,6 +353,7 @@ func (e *encoder) genSlice(path string, typ *types.Slice, obj types.Object) {
 			e.emit("size += %v", e.n)
 		}
 		e.emit("}")
+	}
 	// see vvv
 	e.emit("}")
 	e.n = 0