16. According to the Internet
Ruby has a Global Interpreter Lock (GIL), aka Global
Virtual Machine Lock (GVL)
The GIL is soulless, heartless, and pure evil
The GIL hates you and wants you to be miserable
The GIL eats babies for breakfast, kittens for desert,
and puppies for a midnight snack
The GIL is the sole cause of climate change
If there was no GIL there would be no war
Source - Jerry D'Antonio (Everything You Know About The GIL Is Wrong)