I am adding a `3D model` containing animations to the scene that I previously download from the internet. Before adding this `node` I use `prepare` function on it because I wan't to avoid frame drop. But still I get a very short frame drop to about 47 fps. This is caused by executing this `prepare` function. I also tried using `prepare(_:, shouldAbortBlock:)` on other dispatch queue, but this still didn't help. Can someone help me resolve this or tell me why there is this happening?

```
arView.sceneView.prepare([mediaNode]) { [mediaNode, weak self] (success) in
    guard let `self` = self else { return }
    guard
        let currentMediaNode = self.mediaNode as? SCNNode,
        currentMediaNode === mediaNode,
        !self.mainNode.childNodes.contains(mediaNode)
        else { return }
    self.mainNode.addChildNode(mediaNode)
}

```

By the way this is a list of files I'm using to load this model:

```
https://www.dropbox.com/s/7968fe5wfdcxbyu/Serah-iOS.dae?dl=1
https://www.dropbox.com/s/zqb6b6rxynnvc5e/0001.png?dl=1
https://www.dropbox.com/s/hy9y8qyazkcnvef/0002.tga?dl=1
https://www.dropbox.com/s/fll9jbjud7zjlsq/0004.tga?dl=1
https://www.dropbox.com/s/4niq12mezlvi5oz/0005.png?dl=1
https://www.dropbox.com/s/wikqgd46643327i/0007.png?dl=1
https://www.dropbox.com/s/fioj9bqt90vq70c/0008.tga?dl=1
https://www.dropbox.com/s/4a5jtmccyx413j7/0010.png?dl=1

```

DAE file is already compiled by Xcode tools so that it can be loaded after being downloaded from the internet. And this is the code I use to load it after it's downloaded:

```
class func loadModel(fromURL url: URL) -> SCNNode? {
    let options = [SCNSceneSource.LoadingOption.animationImportPolicy : SCNSceneSource.AnimationImportPolicy.playRepeatedly]
    let sceneSource = SCNSceneSource(url: url, options: options)
    let node = sceneSource?.entryWithIdentifier("MDL_Obj", withClass: SCNNode.self)
    return node
}

```