If I load simple Roboto font with 300 weight, Google loads so many font in it, please have a look at this
https://fonts.googleapis.com/css?family=Roboto:300
It loads all:
cyrillic-ext, cyrillic, greek-ext, greek etc..
Is this normal behavior ? how can I avoid this as if I load 3 fonts, it will be loading 18 and this is serious speed issue.