cocos2d-JS 性能优化 - 对象缓冲池 ( cc.pool )

对象缓冲池 ( cc.pool ) :

作用 :

缓冲池 API :

cc.pool.putInPool(obj);             //将对象放入缓冲池
cc.pool.hasObject(objClass);        //判断缓冲池是否存在可用的指定对象
cc.pool.removeObject(obj);          //删除指定对象
cc.pool.getFromPool(objClass);      //从缓冲池获取指定对象
cc.pool.drainAllPools();            //清空缓冲池

用法 :

var Hero = cc.Sprite.extend({
_hp:null,
_mp:null,
ctor: function(hp,mp){
this._super("res/box.png");
this.initData(hp,mp);
},

initData: function(hp,mp){
this._hp = hp;
this._mp = mp;
},

unuse: function(){
this._hp = 0;     //属性清空
this._mp = 0;
this.retain();    //保存  防止被回收
this.removeFromParent();
},

reuse: function(hp,mp){
this.initData(hp,mp);
}
});

var CreateHero = function(hp,mp){
if(cc.pool.hasObject(Hero))   //判断缓冲池里 是否存在 Hero对象
{
cc.log('取出');
return cc.pool.getFromPool(Hero,hp,mp);   // 从缓冲池里取出 Hero对象
}
else
{
cc.log('新创建');
return new Hero(hp,mp)
}
};

var HelloWorldLayer = cc.Layer.extend({
ctor:function () {
this._super();
this.preparHeroPool();    //预先将5000个Hero放入缓冲池

this.create(1);   //第一轮  从对象池取出5000个
this.create(2);   //第二轮  新创建5000个
},

create: function(num){

var time = new Date().getTime();

for(var i = 0; i < 5000; i++)
{
var hero = CreateHero(1,2);
hero.setPosition(cc.winSize.width/2, cc.winSize.height/2);
this.addChild(hero);
}

var totleTime = new Date().getTime() - time;
cc.log("第 "+num+" 轮总耗时 = ",totleTime);
},

preparHeroPool: function(){

for(var i = 0; i < 5000; i++)
{
var node = new Hero(0,0);
cc.pool.putInPool(node);
}
},

});

结果 :