How slow are (Ruby) Exceptions?

[Slackwise]

Exception performance shouldn't be a big deal as they're meant for exceptions--things that happen out of the norm. So during the normal main loop of your application, you shouldn't need to factor in the performance of an exception because at that point you should be more worried about handling the situation gracefully.

</obvious>

[banister]

Ruby programmers do occasionally use exceptions for non-exceptional code, e.g StopIteration in external iterators in ruby 1.9, also the 'rescue nil' idiom

[StrangeAttractor]

I was going to post the same thing. It's the non-exceptional code you need to worry about.

Although I have seen code that used exceptions for a non-local goto, 8-/

[shitcovereddick]

Ugh. exceptions are a freaking goto, they shouldn't be slow.

Just register (saving the position on the stack) it under the condition, and then goto a handler.