cs2 perf improvements

Author: markus-wa

pkg/demoinfocs/sendtables2/entity.go

@@ -25,6 +25,7 @@ type Entity struct {
 	onCreateFinished []func()
 	onDestroy        []func()
 	updateHandlers   map[string][]st.PropertyUpdateHandler
+	propCache        map[string]st.Property
 }
 
 func (e *Entity) ServerClass() st.ServerClass {
@@ -126,15 +127,19 @@ func (p property) Bind(variable any, t st.PropertyValueType) {
 }
 
 func (e *Entity) Property(name string) st.Property {
-	ok := e.class.serializer.checkFieldName(name)
-	if !ok {
-		return nil
-	}
+	if e.propCache[name] == nil {
+		ok := e.class.serializer.checkFieldName(name)
+		if !ok {
+			return nil
+		}
 
-	return property{
-		entity: e,
-		name:   name,
+		e.propCache[name] = property{
+			entity: e,
+			name:   name,
+		}
 	}
+
+	return e.propCache[name]
 }
 
 func (e *Entity) BindProperty(prop string, variable any, t st.PropertyValueType) {
@@ -258,6 +263,7 @@ func newEntity(index, serial int32, class *class) *Entity {
 		onCreateFinished: nil,
 		onDestroy:        nil,
 		updateHandlers:   make(map[string][]st.PropertyUpdateHandler),
+		propCache:        map[string]st.Property{},
 	}
 }
 
@@ -406,10 +412,10 @@ func (p *Parser) FilterEntity(fb func(*Entity) bool) []*Entity {
 	return entities
 }
 
-func (e *Entity) readFields(r *reader) {
-	fps := readFieldPaths(r)
+func (e *Entity) readFields(r *reader, paths *[]*fieldPath) {
+	readFieldPaths(r, paths)
 
-	for _, fp := range fps {
+	for _, fp := range *paths {
 		decoder := e.class.serializer.getDecoderForFieldPath(fp, 0)
 
 		val := decoder(r)
@@ -456,7 +462,10 @@ func (p *Parser) OnPacketEntities(m *msgs2.CSVCMsg_PacketEntities) error {
 		op  st.EntityOp
 	}
 
-	var tuples []tuple
+	var (
+		tuples []tuple
+		paths  = make([]*fieldPath, 0)
+	)
 
 	for ; updates > 0; updates-- {
 		var (
@@ -487,8 +496,11 @@ func (p *Parser) OnPacketEntities(m *msgs2.CSVCMsg_PacketEntities) error {
 				e = newEntity(index, serial, class)
 				p.entities[index] = e
 
-				e.readFields(newReader(baseline))
-				e.readFields(r)
+				e.readFields(newReader(baseline), &paths)
+				paths = paths[:0]
+
+				e.readFields(r, &paths)
+				paths = paths[:0]
 
 				// Fire created-handlers so update-handlers can be registered
 				for _, h := range class.createdHandlers {
@@ -512,7 +524,8 @@ func (p *Parser) OnPacketEntities(m *msgs2.CSVCMsg_PacketEntities) error {
 					op |= st.EntityOpEntered
 				}
 
-				e.readFields(r)
+				e.readFields(r, &paths)
+				paths = paths[:0]
 			}
 		} else {
 			e = p.entities[index]

pkg/demoinfocs/sendtables2/field_path.go

@@ -306,36 +306,34 @@ func (fp *fieldPath) release() {
 }
 
 // readFieldPaths reads a new slice of fieldPath values from the given reader
-func readFieldPaths(r *reader) []*fieldPath {
+func readFieldPaths(r *reader, paths *[]*fieldPath) {
 	fp := newFieldPath()
 
 	node := huffTree
 
-	paths := []*fieldPath{}
-
 	for !fp.done {
 		var next huffmanTree
 
-		if r.readBits(1) == 1 {
+		if r.readBoolean() {
 			next = node.Right()
 		} else {
 			next = node.Left()
 		}
 
 		if next.IsLeaf() {
 			node = huffTree
+
 			fieldPathTable[next.Value()].fn(r, fp)
+
 			if !fp.done {
-				paths = append(paths, fp.copy())
+				*paths = append(*paths, fp.copy())
 			}
 		} else {
 			node = next
 		}
 	}
 
 	fp.release()
-
-	return paths
 }
 
 // newHuffmanTree creates a new huffmanTree from the field path table

pkg/demoinfocs/sendtables2/quantizedfloat.go

@@ -64,6 +64,8 @@ func (qfd *quantizedFloatDecoder) validateFlags() {
 	}
 }
 
+var qFloatMultipliers = []float32{0.9999, 0.99, 0.9, 0.8, 0.7}
+
 // Assign multipliers
 func (qfd *quantizedFloatDecoder) assignMultipliers(steps uint32) {
 	qfd.HighLowMul = 0.0
@@ -85,9 +87,8 @@ func (qfd *quantizedFloatDecoder) assignMultipliers(steps uint32) {
 
 	// Adjust precision
 	if (HighMul*Range > float32(High)) || (float64(HighMul*Range) > float64(High)) {
-		multipliers := []float32{0.9999, 0.99, 0.9, 0.8, 0.7}
 
-		for _, mult := range multipliers {
+		for _, mult := range qFloatMultipliers {
 			HighMul = float32(High) / Range * mult
 
 			if (HighMul*Range > float32(High)) || (float64(HighMul*Range) > float64(High)) {