RTTI performance penalty - EABI/ELF

Joachim Siegler

Hi Guys,

I read about the performance penalty caused by the use of RTTI and exeptions within COFF. LINK

In this post a TI employee wrote that the performance penalty caused by the use of exceptions within the EABI/ELF is significantly lower as with COFF. What I'm looking for is a comparision of the performance penalty caused by the use of RTTI with COFF and EABI/ELF.

Thanks,
Jo

over 13 years ago

0 George Mock over 13 years ago

TI__Guru**** 251300 points

The overhead of using RTTI is entirely in memory footprint. There is no overhead in cycles. You can see memory footprint by looking at the linker map file. Though many find it more convenient to use sectti from the cg_xml package. Build your app with and without --rtti, and note the difference in memory footprint. I expect it will be a few percent. But the only way to be sure is to measure it.

Thanks and regards,

-George

0 Joachim Siegler over 13 years ago in reply to George Mock

Intellectual 765 points

Hi George,

Thank you for your answer. Excuse me, please, that I forgot to verify your answer.

- Jo

Code Composer Studio™︎

Code Composer Studio forum

RTTI performance penalty - EABI/ELF