优化

Makefile

@@ -1,2 +1,2 @@
 bench:
-	go test -bench=. -benchmem -count=3
+	go test -bench=. -benchmem

README.md

@@ -3,4 +3,5 @@
 
 #### 目前实现：
 - 九宫格
-- 四叉树
+- 四叉树
+

aoi.go

@@ -1,12 +1,28 @@
 package aoi
 
+import "sync"
+
 type AOI interface {
-	Add(entity *Entity)                       // 添加实体
+	Add(x, y float64, name string)         // 添加实体
-	Delete(entity *Entity)                    // 移除实体
+	Delete(x, y float64, name string)      // 移除实体
-	Search(entity *Entity) (result []*Entity) // 范围查询
+	Search(x, y float64) (result []string) // 范围查询
 }
 
 type Entity struct {
 	X, Y float64
-	Name string
+	Key  string
+}
+
+var (
+	resultPool sync.Pool
+	entityPool sync.Pool
+)
+
+func init() {
+	resultPool.New = func() interface{} {
+		return make([]string, 0, 500)
+	}
+	entityPool.New = func() interface{} {
+		return &Entity{}
+	}
 }

grid.go

@@ -2,6 +2,12 @@ package aoi
 
 import "sync"
 
+var (
+	// 分别将这8个方向的方向向量按顺序写入x, y的分量数组
+	dx = []int{-1, -1, -1, 0, 0, 1, 1, 1}
+	dy = []int{-1, 0, 1, -1, 1, -1, 0, 1}
+)
+
 // Grid 格子
 type Grid struct {
 	GID      int      //格子ID
@@ -15,6 +21,7 @@ type GridManger struct {
 	AreaWidth int // 格子宽度(长=宽)
 	GridCount int // 格子数量
 	grids     map[int]*Grid
+	pool      sync.Pool
 }
 
 func NewGrid(gid int) *Grid {
@@ -31,6 +38,9 @@ func NewGridManger(startX, startY, areaWidth, gridCount int) AOI {
 		GridCount: gridCount,
 		grids:     make(map[int]*Grid),
 	}
+	manager.pool.New = func() interface{} {
+		return make([]*Grid, 0, 9)
+	}
 
 	for y := 0; y < gridCount; y++ {
 		for x := 0; x < gridCount; x++ {
@@ -47,66 +57,76 @@ func (g *GridManger) gridWidth() int {
 	return g.AreaWidth / g.GridCount
 }
 
-// GetGIDByPos 通过横纵坐标获取对应的格子ID
+// getGIDByPos 通过横纵坐标获取对应的格子ID
-func (g *GridManger) GetGIDByPos(entity *Entity) int {
+func (g *GridManger) getGIDByPos(x, y float64) int {
-	gx := (int(entity.X) - g.StartX) / g.gridWidth()
+	gx := (int(x) - g.StartX) / g.gridWidth()
-	gy := (int(entity.Y) - g.StartY) / g.gridWidth()
+	gy := (int(y) - g.StartY) / g.gridWidth()
 
 	return gy*g.GridCount + gx
 }
 
-// GetSurroundGrids 根据格子的gID得到当前周边的九宫格信息
+// getSurroundGrids 根据格子的gID得到当前周边的九宫格信息
-func (g *GridManger) GetSurroundGrids(gID int) (grids []*Grid) {
+func (g *GridManger) getSurroundGrids(gID int) []*Grid {
+	grids := g.pool.Get().([]*Grid)
+	defer func() {
+		grids = grids[:0]
+		g.pool.Put(grids)
+	}()
+
 	if _, ok := g.grids[gID]; !ok {
-		return
+		return grids
 	}
 	grids = append(grids, g.grids[gID])
-
 	// 根据gID, 得到格子所在的坐标
 	x, y := gID%g.GridCount, gID/g.GridCount
 
-	// 分别将这8个方向的方向向量按顺序写入x, y的分量数组
-	dx := []int{-1, -1, -1, 0, 0, 1, 1, 1}
-	dy := []int{-1, 0, 1, -1, 1, -1, 0, 1}
-
-	surroundGID := make([]int, 0)
 	for i := 0; i < 8; i++ {
 		newX := x + dx[i]
 		newY := y + dy[i]
 
 		if newX >= 0 && newX < g.GridCount && newY >= 0 && newY < g.GridCount {
-			surroundGID = append(surroundGID, newY*g.GridCount+newX)
+			grids = append(grids, g.grids[newY*g.GridCount+newX])
 		}
 	}
 
-	for _, gID := range surroundGID {
+	return grids
-		grids = append(grids, g.grids[gID])
+}
+
+func (g *GridManger) Add(x, y float64, key string) {
+	entity := entityPool.Get().(*Entity)
+	entity.X = x
+	entity.Y = y
+	entity.Key = key
+
+	ID := g.getGIDByPos(x, y)
+	grid := g.grids[ID]
+	grid.Entities.Store(key, entity)
+}
+
+func (g *GridManger) Delete(x, y float64, key string) {
+	ID := g.getGIDByPos(x, y)
+	grid := g.grids[ID]
+
+	if entity, ok := grid.Entities.Load(key); ok {
+		grid.Entities.Delete(key)
+		entityPool.Put(entity)
 	}
-
-	return
 }
 
-func (g *GridManger) Add(entity *Entity) {
+func (g *GridManger) Search(x, y float64) []string {
-	ID := g.GetGIDByPos(entity)
+	result := resultPool.Get().([]string)
-	grid := g.grids[ID]
+	defer func() {
-	grid.Entities.Store(entity.Name, entity)
+		result = result[:0]
-}
+		resultPool.Put(result)
-
+	}()
-func (g *GridManger) Delete(entity *Entity) {
+	ID := g.getGIDByPos(x, y)
-	ID := g.GetGIDByPos(entity)
+	grids := g.getSurroundGrids(ID)
-	grid := g.grids[ID]
-	grid.Entities.Delete(entity.Name)
-}
-
-func (g *GridManger) Search(entity *Entity) (result []*Entity) {
-	ID := g.GetGIDByPos(entity)
-	grids := g.GetSurroundGrids(ID)
 	for _, grid := range grids {
 		grid.Entities.Range(func(_, value interface{}) bool {
-			result = append(result, value.(*Entity))
+			result = append(result, value.(*Entity).Key)
 			return true
 		})
 	}
 
-	return
+	return result
 }

grid_test.go

@@ -24,44 +24,34 @@ func TestGridManger_GetSurroundGrids(t *testing.T) {
 	aol := NewGridManger(0, 0, 250, 5)
 	manger := aol.(*GridManger)
 	tests := []struct {
-		entity *Entity
+		x, y float64
-		want   []int
+		want []int
 	}{
 		{
-			entity: &Entity{
+			x: 0, y: 0,
-				X: 0, Y: 0,
-			},
 			want: []int{0, 1, 5, 6},
 		},
 		{
-			entity: &Entity{
+			x: 150, y: 0,
-				X: 150, Y: 0,
-			},
 			want: []int{2, 3, 4, 7, 8, 9},
 		},
 		{
-			entity: &Entity{
+			x: 50, y: 50,
-				X: 50, Y: 50,
-			},
 			want: []int{0, 1, 2, 5, 6, 7, 10, 11, 12},
 		},
 		{
-			entity: &Entity{
+			x: 200, y: 100,
-				X: 200, Y: 100,
-			},
 			want: []int{8, 9, 13, 14, 18, 19},
 		},
 		{
-			entity: &Entity{
+			x: 200, y: 200,
-				X: 200, Y: 200,
-			},
 			want: []int{18, 19, 23, 24},
 		},
 	}
 
 	for _, tt := range tests {
-		ID := manger.GetGIDByPos(tt.entity)
+		ID := manger.getGIDByPos(tt.x, tt.y)
-		grids := manger.GetSurroundGrids(ID)
+		grids := manger.getSurroundGrids(ID)
 		gID := make([]int, 0)
 		for _, grid := range grids {
 			gID = append(gID, grid.GID)
@@ -76,51 +66,51 @@ func TestNewGridManger(t *testing.T) {
 	manger := aol.(*GridManger)
 	entities := []*Entity{
 		{
-			X: 0, Y: 0, Name: "a",
+			X: 0, Y: 0, Key: "a",
 		},
 		{
-			X: 50, Y: 0, Name: "b",
+			X: 50, Y: 0, Key: "b",
 		},
 		{
-			X: 100, Y: 0, Name: "c",
+			X: 100, Y: 0, Key: "c",
 		},
 		{
-			X: 50, Y: 0, Name: "d",
+			X: 50, Y: 0, Key: "d",
 		},
 		{
-			X: 50, Y: 50, Name: "e",
+			X: 50, Y: 50, Key: "e",
 		},
 		{
-			X: 50, Y: 100, Name: "f",
+			X: 50, Y: 100, Key: "f",
 		},
 		{
-			X: 100, Y: 0, Name: "g",
+			X: 100, Y: 0, Key: "g",
 		},
 		{
-			X: 100, Y: 50, Name: "h",
+			X: 100, Y: 50, Key: "h",
 		},
 		{
-			X: 100, Y: 100, Name: "i",
+			X: 100, Y: 100, Key: "i",
 		},
 	}
 
 	for _, entity := range entities {
-		manger.Add(entity)
+		manger.Add(entity.X, entity.Y, entity.Key)
 	}
 
-	search := manger.Search(&Entity{X: 50, Y: 50})
+	search := manger.Search(50, 50)
 	result := make([]string, 0)
 	for _, entity := range search {
-		result = append(result, entity.Name)
+		result = append(result, entity)
 	}
 	sort.Strings(result)
 	assert.Equal(t, []string{"a", "b", "c", "d", "e", "f", "g", "h", "i"}, result)
 
-	manger.Delete(&Entity{X: 100, Y: 100, Name: "i"})
+	manger.Delete(100, 100, "i")
-	search2 := manger.Search(&Entity{X: 50, Y: 50})
+	search2 := manger.Search(50, 50)
 	result2 := make([]string, 0)
 	for _, entity := range search2 {
-		result2 = append(result2, entity.Name)
+		result2 = append(result2, entity)
 	}
 	sort.Strings(result2)
 	assert.Equal(t, []string{"a", "b", "c", "d", "e", "f", "g", "h"}, result2)
@@ -128,7 +118,7 @@ func TestNewGridManger(t *testing.T) {
 
 func BenchmarkGridManger(b *testing.B) {
 	var wg sync.WaitGroup
-	aol := NewGridManger(0, 0, 256, 16)
+	aol := NewGridManger(0, 0, 1024, 16)
 	manger := aol.(*GridManger)
 
 	rand.Seed(time.Now().UnixNano())
@@ -136,28 +126,28 @@ func BenchmarkGridManger(b *testing.B) {
 		wg.Add(30000)
 		for j := 0; j < 10000; j++ {
 			go func() {
-				manger.Add(&Entity{
+				manger.Add(
-					X:    float64(rand.Intn(5) * 10),
+					float64(rand.Intn(10)*10+rand.Intn(10)),
-					Y:    float64(rand.Intn(5) * 10),
+					float64(rand.Intn(10)*10+rand.Intn(10)),
-					Name: fmt.Sprintf("player%d", rand.Intn(50)),
+					fmt.Sprintf("player%d", rand.Intn(100)),
-				})
+				)
 				wg.Done()
 			}()
 
 			go func() {
-				manger.Delete(&Entity{
+				manger.Delete(
-					X:    float64(rand.Intn(5) * 10),
+					float64(rand.Intn(10)*10+rand.Intn(10)),
-					Y:    float64(rand.Intn(5) * 10),
+					float64(rand.Intn(10)*10+rand.Intn(10)),
-					Name: fmt.Sprintf("player%d", rand.Intn(50)),
+					fmt.Sprintf("player%d", rand.Intn(100)),
-				})
+				)
 				wg.Done()
 			}()
 
 			go func() {
-				manger.Search(&Entity{
+				manger.Search(
-					X: float64(rand.Intn(5) * 10),
+					float64(rand.Intn(10)*10+rand.Intn(10)),
-					Y: float64(rand.Intn(5) * 10),
+					float64(rand.Intn(10)*10+rand.Intn(10)),
-				})
+				)
 				wg.Done()
 			}()
 		}

quadtree.go

@@ -9,19 +9,16 @@ const (
 	rightDown
 
 	maxCap  = 500 // 节点最大容量
-	maxDeep = 3   // 节点最大深度
+	maxDeep = 4   // 节点最大深度
 	radius  = 16  // 视野半径
 )
 
-type QuadOption func(*QuadTree)
-
 type Node struct {
 	Leaf      bool      // 是否为叶子节点
 	Deep      int       // 深度
 	AreaWidth float64   // 格子宽度(长=宽)
 	XStart    float64   // 起始范围
 	YStart    float64   // 起始范围
-	Parent    *Node     // 父节点
 	Tree      *QuadTree // 树指针
 	Child     [4]*Node  // 子节点
 	Entities  *sync.Map // 实体
@@ -30,6 +27,7 @@ type Node struct {
 type QuadTree struct {
 	maxCap, maxDeep int
 	radius          float64
+	mPool           sync.Pool
 	*Node
 }
 
@@ -40,9 +38,8 @@ func NewSonNode(xStart, yStart float64, parent *Node) *Node {
 		AreaWidth: parent.AreaWidth / 2,
 		XStart:    xStart,
 		YStart:    yStart,
-		Parent:    parent,
 		Tree:      parent.Tree,
-		Entities:  &sync.Map{},
+		Entities:  parent.Tree.mPool.Get().(*sync.Map),
 	}
 
 	return son
@@ -99,21 +96,22 @@ func (n *Node) cutNode() {
 	n.Child[rightDown] = NewSonNode(n.XStart+half, n.YStart+half, n)
 
 	// 将实体迁移到对应子节点
-	n.Entities.Range(func(_, v interface{}) bool {
+	n.Entities.Range(func(k, v interface{}) bool {
 		entity := v.(*Entity)
 		for _, node := range n.Child {
 			if node.intersects(entity.X, entity.Y) {
-				node.Entities.Store(entity.Name, entity)
+				node.Entities.Store(entity.Key, entity)
 			}
 		}
+		n.Entities.Delete(k)
 		return true
 	})
 
-	// 清空容器
+	n.Tree.mPool.Put(n.Entities)
 	n.Entities = nil
 }
 
-func NewQuadTree(xStart, yStart, width float64, opts ...QuadOption) AOI {
+func NewQuadTree(xStart, yStart, width float64) AOI {
 	basicNode := &Node{
 		Leaf:      true,
 		Deep:      1,
@@ -121,7 +119,6 @@ func NewQuadTree(xStart, yStart, width float64, opts ...QuadOption) AOI {
 		XStart:    xStart,
 		YStart:    yStart,
 		Child:     [4]*Node{},
-		Entities:  &sync.Map{},
 	}
 	tree := &QuadTree{
 		maxDeep: maxDeep,
@@ -129,12 +126,15 @@ func NewQuadTree(xStart, yStart, width float64, opts ...QuadOption) AOI {
 		radius:  radius,
 		Node:    basicNode,
 	}
+	tree.mPool.New = func() interface{} {
+		return &sync.Map{}
+	}
 	basicNode.Tree = tree
-
+	basicNode.Entities = tree.mPool.Get().(*sync.Map)
 	return tree
 }
 
-func (n *Node) Add(entity *Entity) {
+func (n *Node) Add(x, y float64, name string) {
 	// 判断是否需要分割
 	if n.Leaf && n.needCut() {
 		n.cutNode()
@@ -142,39 +142,57 @@ func (n *Node) Add(entity *Entity) {
 
 	// 非叶子节点往下递归
 	if !n.Leaf {
-		n.Child[n.findSonQuadrant(entity.X, entity.Y)].Add(entity)
+		n.Child[n.findSonQuadrant(x, y)].Add(x, y, name)
 		return
 	}
 
+	entity := entityPool.Get().(*Entity)
+	entity.X = x
+	entity.Y = y
+	entity.Key = name
+
 	// 叶子节点进行存储
-	n.Entities.Store(entity.Name, entity)
+	n.Entities.Store(entity.Key, entity)
 }
 
-func (n *Node) Delete(entity *Entity) {
+func (n *Node) Delete(x, y float64, name string) {
 	if !n.Leaf {
-		n.Child[n.findSonQuadrant(entity.X, entity.Y)].Delete(entity)
+		n.Child[n.findSonQuadrant(x, y)].Delete(x, y, name)
 		return
 	}
 
-	n.Entities.Delete(entity.Name)
+	if entity, ok := n.Entities.Load(name); ok {
+		n.Entities.Delete(name)
+		entityPool.Put(entity)
+	}
 }
 
-func (n *Node) Search(entity *Entity) (result []*Entity) {
+func (n *Node) Search(x, y float64) []string {
+	result := resultPool.Get().([]string)
+	defer func() {
+		result = result[:0]
+		resultPool.Put(result)
+	}()
+	n.search(x, y, &result)
+	return result
+}
+
+func (n *Node) search(x, y float64, result *[]string) {
 	if !n.Leaf {
-		minX, maxX := entity.X-n.Tree.radius, entity.X+n.Tree.radius
+		minX, maxX := x-n.Tree.radius, x+n.Tree.radius
-		minY, maxY := entity.Y-n.Tree.radius, entity.Y+n.Tree.radius
+		minY, maxY := y-n.Tree.radius, y+n.Tree.radius
 
 		for _, son := range n.Child {
 			if son.intersects(minX, minY) || son.intersects(maxX, minY) ||
 				son.intersects(minX, maxY) || son.intersects(maxX, maxY) {
-				result = append(result, son.Search(entity)...)
+				son.search(x, y, result)
 			}
 		}
 		return
 	}
 
 	n.Entities.Range(func(key, value interface{}) bool {
-		result = append(result, value.(*Entity))
+		*result = append(*result, value.(*Entity).Key)
 		return true
 	})
 	return

quadtree_test.go

@@ -68,20 +68,10 @@ func Test_NeedCut(t *testing.T) {
 
 	tree.maxCap = 2 // 超过两人节点分裂
 	assert.Equal(t, false, tree.needCut())
-	player1 := &Entity{
+	tree.Add(60.9, 24.9, "player1")
-		X:    60.9,
-		Y:    24.9,
-		Name: "player1",
-	}
-	tree.Add(player1)
 
 	assert.Equal(t, false, tree.needCut())
-	player2 := &Entity{
+	tree.Add(25, 25, "player2")
-		X:    25,
-		Y:    25,
-		Name: "player2",
-	}
-	tree.Add(player2)
 
 	assert.Equal(t, true, tree.needCut())
 }
@@ -91,63 +81,50 @@ func TestNode_Search(t *testing.T) {
 	tree := aoi.(*QuadTree)
 	tree.maxCap = 2 // 超过两人节点分裂
 	tree.radius = 5
-	player1 := &Entity{
-		X:    60.9,
-		Y:    24.9,
-		Name: "player1",
-	}
-	tree.Add(player1)
 
-	player2 := &Entity{
+	tree.Add(60.9, 24.9, "player1")
-		X:    25,
+	tree.Add(25, 25, "player2")
-		Y:    25,
+
-		Name: "player2",
+	// 查询player1附近
-	}
+	entities := tree.Search(60.9, 24.9)
-	tree.Add(player2)
-	entities := tree.Search(player1)
 	assert.Equal(t, 2, len(entities), "player1 player2")
 
 	// 当出现第三个玩家超过节点最大容量产生分裂
-	player3 := &Entity{
+	tree.Add(99, 24, "player3")
-		X:    99,
+
-		Y:    24,
+	// 查询player1附近
-		Name: "player3",
+	entities = tree.Search(60.9, 24.9)
-	}
-	tree.Add(player3)
-	entities = tree.Search(player1)
 	assert.Equal(t, 2, len(entities), "player1 player3")
 
 	// 添加第四个玩家
-	player4 := &Entity{
+	tree.Add(72, 23, "player4")
-		X:    72,
+
-		Y:    23,
+	// 查询player1附近
-		Name: "player4",
+	entities = tree.Search(60.9, 24.9)
-	}
-	tree.Add(player4)
-	entities = tree.Search(player1)
 	assert.Equal(t, 2, len(entities), "player1 player4")
 
-	entities = tree.Search(player2)
+	// 查询player2附近
+	entities = tree.Search(25, 25)
 	assert.Equal(t, 1, len(entities), "player2")
 
 	// 添加第五个玩家
-	player5 := &Entity{
+	tree.Add(49.9, 49.9, "player5")
-		X:    49.9,
+
-		Y:    49.9,
+	// 查询player2附近
-		Name: "player5",
+	entities = tree.Search(25, 25)
-	}
-	tree.Add(player5)
-	entities = tree.Search(player2)
 	assert.Equal(t, 2, len(entities), "player2 player5")
 
-	tree.Delete(player5)
+	// 移除player5
-	entities = tree.Search(player2)
+	tree.Delete(49.9, 49.9, "player5")
+
+	// 查询player2附近
+	entities = tree.Search(25, 25)
 	assert.Equal(t, 1, len(entities), "player2")
 }
 
 func BenchmarkQuadtree(b *testing.B) {
 	var wg sync.WaitGroup
-	aoi := NewQuadTree(0, 0, 100)
+	aoi := NewQuadTree(0, 0, 1024)
 	tree := aoi.(*QuadTree)
 	rand.Seed(time.Now().UnixNano())
 
@@ -155,28 +132,28 @@ func BenchmarkQuadtree(b *testing.B) {
 		wg.Add(30000)
 		for j := 0; j < 10000; j++ {
 			go func() {
-				tree.Add(&Entity{
+				tree.Add(
-					X:    float64(rand.Intn(5) * 10),
+					float64(rand.Intn(10)*10+rand.Intn(10)),
-					Y:    float64(rand.Intn(5) * 10),
+					float64(rand.Intn(10)*10+rand.Intn(10)),
-					Name: fmt.Sprintf("player%d", rand.Intn(50)),
+					fmt.Sprintf("player%d", rand.Intn(100)),
-				})
+				)
 				wg.Done()
 			}()
 
 			go func() {
-				tree.Delete(&Entity{
+				tree.Delete(
-					X:    float64(rand.Intn(5) * 10),
+					float64(rand.Intn(10)*10+rand.Intn(10)),
-					Y:    float64(rand.Intn(5) * 10),
+					float64(rand.Intn(10)*10+rand.Intn(10)),
-					Name: fmt.Sprintf("player%d", rand.Intn(50)),
+					fmt.Sprintf("player%d", rand.Intn(100)),
-				})
+				)
 				wg.Done()
 			}()
 
 			go func() {
-				tree.Search(&Entity{
+				tree.Search(
-					X: float64(rand.Intn(5) * 10),
+					float64(rand.Intn(10)*10+rand.Intn(10)),
-					Y: float64(rand.Intn(5) * 10),
+					float64(rand.Intn(10)*10+rand.Intn(10)),
-				})
+				)
 				wg.Done()
 			}()
 		}