Fastest growing? Well, maybe. Depends on how you define it.
TIOBE says that C grew by +1.69% in 2017. Dart has a total of 1.426% (not growth, total). Dart may have grown more as a fraction of its earlier total, but C grew more total. So which is growing "faster"?
TIOBE says that C grew by +1.69% in 2017. Dart has a total of 1.426% (not growth, total). Dart may have grown more as a fraction of its earlier total, but C grew more total. So which is growing "faster"?