Flexible Content Field speed

Hey,

Thanks for developing this amazing package.
I'm testing the flexible content field as follows:

```
$page = Page::find(17);
$modules = $page->acf->flexibleContent('modules');
```

This alone takes 8+ seconds, which I'm assuming is due to the number of queries it has to make.
I have 2 layouts, both have repeaters in them, but they contain a few text and image fields. It seems it is returning all of the field data, but doing each field individually and probably generating a lot of queries to get to this.