Huge memory spikes on Texture2D.LoadImage()

Hi,

I met a trouble loading image from local path ( Application.persistentDataPath ). Normally app take 50-60mb, but after code
that raise up to 180mb only for 2 small images 200x200px.
Using WWW method everything worked fine.

Does someone know why that happens? I am using Unity 5.4b19, but...

Huge memory spikes on Texture2D.LoadImage()