Seems it's a highly refined version of what was done in the "old" days. I remember doing something similar for an old project in ASP.NET. (Well more similar to

Seems it's a highly refined version of what was done in the "old" days. I remember doing something similar for an old project in ASP.NET. (Well more similar to pjax) As to performance on mobile, i think it might all depend on how large the html fragments are.