Excessively slow with multiple items

[ion-dev]

Is zone.run really required? It's very very slow for multiple items.

I can see that in the file ngx-file-drop.js you've wrapped " this.traverseFileTree(entries[i], path + entries[i].name); " with zone.run, however, this makes it really slow.

For 1800 files it takes over 16 seconds!

I've tested it without and everything works fine + it takes only about 200ms.

Any chance you could remove this and backdate the fix to v11 ?

Thanks massively! it's a really cool feature