Yeah, that line feels like lazy reporting to me. Any involvement at any in the Ruby community over the past few years and they would know that very few Ruby developers are concerned about the performance issues past a certain scale.
Seems like a no brainer that something that is a lot more strict and static will outperform something that has to deal with many more possibilities at runtime.
Seems like a no brainer that something that is a lot more strict and static will outperform something that has to deal with many more possibilities at runtime.