Exception vs Errors | Chris Lattner and Lex Fridman

C++

• In c++ they call it the zero cost exception handling but it’s not really zero cost
• looking up and searching tables will cost you and can cost alot compare to returning a value

Other newer languages like Swift, Go, Rust

• under the hood does something similar to returning a value
• return a good value or error value
• will cost the same as returning from a function

How does it work?

• if a function throws error and the function call was in a try block it will jump to except block.

Conclusion

• throwing exception in c++ can be costly and have to be considered carefully