Oh, my comment wasn't at all clear, but I was talking about inclusion on web pages, where you'd be flicking forward and back between them. In which case even 50ms on top of the rest of a page load would be hurting you.
I'm sure it's fine for a SPA, and for a mobile app it's a total non issue. Actually I'm planning to use it for one with React Native myself.
Luckily, people will probably not be including the full compiler lightly; I just wanted to point out that it's not as cheap as a jpg of the same size would be, an impression I thought the parent comment was giving.