Try-catch statement really slow even if catch is never executed

[jling]

Are exceptions in Julia "Zero Cost"

It would be interesting to see what you tried. The test is, of course, not zero-cost: you still have to execute the condition to see if the exception should be triggered. I’m not seeing any difference, although there is some inconsistency in the @btime results: function f(n::Int) x = rand(Int) t = 0 try for i = 1:n i == x && error("bad i value") t += i end catch end return t end function g(n::Int) x = rand(Int) t = 0 f…

I wonder if this is a regression?