解决办法：

在空闲时候异步预加载，后面切换场景就会快很多，前提是内存充足的情况下。

cocos2d-x lua图片资源异步预加载示例：

1 local jhmjResList = {} 2 jhmjResList[#jhmjResList + 1] = "animate/jhmj_cpgh.png" 3 jhmjResList[#jhmjResList + 1] = "animate/game_flash_outcard_tips.png" 4 jhmjResList[#jhmjResList + 1] = "game/yule/jhmj/res/game/sp_trusteeCover.png" 5 jhmjResList[#jhmjResList + 1] = "game/yule/jhmj/res/game/sp_trusteeMan.png" 6 jhmjResList[#jhmjResList + 1] = "gameScene.png" 7  8 local function callBack(img) 9     local temp1 = cc.Sprite:createWithTexture(img)10     yl.cacheLayer:addChild(temp1)11 end12 13 for i = 1, #jhmjResList do14     if #(jhmjResList[i]) > 0 then15         display.loadImage(jhmjResList[i], callBack)16     end17 end