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Since WHEN?
Since WHEN?
Posted Mar 28, 2008 9:26 UTC (Fri) by khim (subscriber, #9252)In reply to: The metric is SPEED not just easier development by nix
Parent article: Striking gold in binutils
Last time we've checked (GCC 4.1.x) removal -fnortti and/or -fnoexceptions made real world programs 5-10% slower (up to 15% combined). What change happened in GCC 4.2 and/or GCC 4.3???
If you DO need RTTI and/or exceptions of course it's better to use compiler-provided ones, then to write your own, but if not... For things like gold abort() is perfectly usable alternative to the exceptions...
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Since WHEN?
Posted Mar 28, 2008 21:26 UTC (Fri) by nix (subscriber, #2304) [Link]
I think I need to profile this, then, because exception frames should be very nearly free to set up and (non-throw) tear down, certainly not as expensive as 15%. This wasn't on an sjlj target, was it? 'cos they're *so* last millennium.