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Re: String::Cat optimization [message #34622 is a reply to message #34608]

Fri, 02 December 2011 10:22

Tom1
Messages: 1212
Registered: March 2007

Senior Contributor

OK, this was fun!

Just makes me wonder if there could be wider visibility for this optimization. I can imagine memcpy() is used all over the code, and short blocks are not that uncommon. Maybe Core could hold this SVO_MEMCPY macro in a header included via Core.h so that any code can access it?

Best regards,

Tom

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Re: String::Cat optimization [message #34623 is a reply to message #34622]

Fri, 02 December 2011 11:10

mirek
Messages: 13976
Registered: November 2005

Ultimate Member

Tom1 wrote on Fri, 02 December 2011 04:22

Maybe, but I am afraid it would take some time to figure out what to convert to svo_memcpy and what not. Not all cases are suitable.

For now I will just file new RM#:

http://www.ultimatepp.org/redmine/issues/204

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Re: String::Cat optimization [message #34636 is a reply to message #34615]

Fri, 02 December 2011 18:50

Novo
Messages: 1358
Registered: December 2006

Ultimate Contributor

mirek wrote on Fri, 02 December 2011 00:40

Novo wrote on Fri, 02 December 2011 00:02

mirek wrote on Thu, 01 December 2011 14:41

Thanks, this is even better. Somehow I forgot that if compiler decides not to inline something, I can still force it by macro.

There is an easier way to force inlining:

MSVC - __forceinline
GCC - __attribute__((always_inline))

Is it really easier? Smile

Mirek

Make one define (something like FORCE_INLINE) and put it in front of any function you want to make inline. This is it. You do not need to deal with hundreds of back-slashes.

Regards,
Novo

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Re: String::Cat optimization [message #34637 is a reply to message #34636]

Fri, 02 December 2011 19:06

mirek
Messages: 13976
Registered: November 2005

Ultimate Member

Novo wrote on Fri, 02 December 2011 12:50

mirek wrote on Fri, 02 December 2011 00:40

Novo wrote on Fri, 02 December 2011 00:02

mirek wrote on Thu, 01 December 2011 14:41

Thanks, this is even better. Somehow I forgot that if compiler decides not to inline something, I can still force it by macro.

There is an easier way to force inlining:

MSVC - __forceinline
GCC - __attribute__((always_inline))

Is it really easier? Smile

Mirek

Make one define (something like FORCE_INLINE) and put it in front of any function you want to make inline. This is it. You do not need to deal with hundreds of back-slashes.

Actually, I already did, see 'strlen optimization' thread... Smile

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Re: String::Cat optimization [message #36248 is a reply to message #34623]

Wed, 16 May 2012 15:30

mirek
Messages: 13976
Registered: November 2005

Ultimate Member

Moved SVO_MEMCPY to defs.h and added SVO_MEMSET... keeping it as macro.

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