spineLua bad perfomance

local spine = require "spine-gideros.spine"

local function loadSkeleton(atlasFile, jsonFile, x, y, scale, animation, skin)
    local imageLoader = function (path)
        local paint = { type = "image", filename = "data/" .. path }
        return paint
    end

    -- load the atlas
    local atlas = spine.TextureAtlas.new(spine.utils.readFile("data/" .. atlasFile), imageLoader)

    -- load the JSON and create a Skeleton from it
    local json = spine.SkeletonJson.new(spine.AtlasAttachmentLoader.new(atlas))
    json.scale = scale
    local skeletonData = json:readSkeletonDataFile("data/" .. jsonFile)
    local skeleton = spine.Skeleton.new(skeletonData)
    skeleton.flipY = true -- Corona's coordinate system has its y-axis point downwards
    skeleton.group:setPosition(x,y)

    -- Set the skin if we got one
    if skin then skeleton:setSkin(skin) end

    -- create an animation state object to apply animations to the skeleton
    local animationStateData = spine.AnimationStateData.new(skeletonData)
    animationStateData.defaultMix = 0.2
    local animationState = spine.AnimationState.new(animationStateData)

    -- set a name on the group of the skeleton so we can find it during debugging
    skeleton.group.name = jsonFile

    animationState:setAnimationByName(0, animation, true)
    -- return the skeleton an animation state
    return { skeleton = skeleton, state = animationState }
end

local allSpineLuaObjects={}

local function spawnSpineLuaObject()
    allSpineLuaObjects[#allSpineLuaObjects+1]=loadSkeleton("rooster.atlas", "rooster.json", random(0,160,570),random(0,160,1100), 1, "rooster_run_anim")
end

stage:addEventListener(Event.ENTER_FRAME, function(event)
        local delta = event.deltaTime
        for i=1,#allSpineLuaObjects do
            allSpineLuaObjects[i].state:update(delta)
            allSpineLuaObjects[i].state:apply(allSpineLuaObjects[i].skeleton)
            allSpineLuaObjects[i].skeleton:updateWorldTransform()
        end
end)


for i=1,10 do
    spawnSpineLuaObject() --I'm getting only 22fps on a decent phone hardware :(
end