I don't even think it's true anywhere. There's a laundry list of tricks you have to pull to get decent performance out of Unity, and it's a good engine. A more

I don't even think it's true anywhere. There's a laundry list of tricks you have to pull to get decent performance out of Unity, and it's a good engine. A more truthful restatement might be something like, 80% of game engines can be reasonably fast, if you learn their quirks and optimize your game accordingly.