That's true - how about repeating the test with valid code that DOESN'T throw an exception. - Edit - Just tried it, it's not even close (on FF4): tryCatch wi

That's true - how about repeating the test with valid code that DOESN'T throw an exception. - Edit - Just tried it, it's not even close (on FF4): tryCatch with undef - ~55,000 ifCheck with undef - ~2,000,000 tryCatch with Object - ~100,000,000 ifCheck with Object - ~2,000,000 So if an error is not thrown the try/catch expression is WAY faster.