Comments on: The price of a rescue http://www.notsostupid.com/blog/2006/08/31/the-price-of-a-rescue/ we don't believe in slogans Fri, 21 Nov 2008 02:55:34 +0000 http://wordpress.org/?v=2.1 By: Tim Morgan http://www.notsostupid.com/blog/2006/08/31/the-price-of-a-rescue/#comment-350 Tim Morgan Thu, 31 Aug 2006 16:40:40 +0000 http://www.notsostupid.com/blog/2006/08/31/the-price-of-a-rescue/#comment-350 I've always wondered about this. Thanks for finally putting my fears to rest as well. According to your findings, looks like using rescue instead of 'if' may be better overall because it will catch more than just what I remember to test, and like you said, there isn't much of a slowdown. I’ve always wondered about this. Thanks for finally putting my fears to rest as well. According to your findings, looks like using rescue instead of ‘if’ may be better overall because it will catch more than just what I remember to test, and like you said, there isn’t much of a slowdown.

]]> By: Phil Hagelberg http://www.notsostupid.com/blog/2006/08/31/the-price-of-a-rescue/#comment-352 Phil Hagelberg Thu, 31 Aug 2006 23:09:21 +0000 http://www.notsostupid.com/blog/2006/08/31/the-price-of-a-rescue/#comment-352 Yeah, specifying to rescue only the NoMethodErrors is a lot safer. I still don't think I would do it, but I wouldn't rewrite sections of code I inherited if I saw that someone else had done it. Yeah, specifying to rescue only the NoMethodErrors is a lot safer. I still don’t think I would do it, but I wouldn’t rewrite sections of code I inherited if I saw that someone else had done it.

]]> By: The Amazing Blog » Blog Archive » Ruby rescues are not slow http://www.notsostupid.com/blog/2006/08/31/the-price-of-a-rescue/#comment-23156 The Amazing Blog » Blog Archive » Ruby rescues are not slow Mon, 26 Nov 2007 22:21:53 +0000 http://www.notsostupid.com/blog/2006/08/31/the-price-of-a-rescue/#comment-23156 [...] so I think that has given them a bad name everywhere. The only real numbers I could find are from http://www.notsostupid.com/blog/2006/08/31/the-price-of-a-rescue/ . His ‘plain’ test is also missing the conditional that would also have to be executed [...] […] so I think that has given them a bad name everywhere. The only real numbers I could find are from http://www.notsostupid.com/blog/2006/08/31/the-price-of-a-rescue/ . His ‘plain’ test is also missing the conditional that would also have to be executed […]

]]> By: Sam Smoot http://www.notsostupid.com/blog/2006/08/31/the-price-of-a-rescue/#comment-23159 Sam Smoot Mon, 26 Nov 2007 23:09:43 +0000 http://www.notsostupid.com/blog/2006/08/31/the-price-of-a-rescue/#comment-23159 Only one small problem. Your benchmarks don't actually raise any exceptions. :-) This does: http://pastie.textmate.org/private/g4qs8ae3lo5bnpgpeuhp3a The result is that the code that raises exceptions is well over 100 times slower. Exceptions should be reserved for exceptional situations. For convenience I break that rule all the time myself. :-) But still... Only one small problem. Your benchmarks don’t actually raise any exceptions. :-)

This does: http://pastie.textmate.org/private/g4qs8ae3lo5bnpgpeuhp3a

The result is that the code that raises exceptions is well over 100 times slower.

Exceptions should be reserved for exceptional situations. For convenience I break that rule all the time myself. :-) But still…

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