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Subject: Re: question about automatic inline expansion warning

Author: Uri Blass

Date: 08:34:09 09/23/03

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On September 23, 2003 at 11:28:52, Michel Langeveld wrote:

>On September 23, 2003 at 10:51:35, Uri Blass wrote:
>
>>one of the optimization that I do it inline every suitable because I found in
>>the past that it made my program faster.
>>
>>When I used maximal level warning I found hundreds of warning of the following
>>type:
>>
>>warning C4711: function 'fill_dir_white_small' selected for automatic inline
>>expansion
>>
>>I wonder if it is better not to do it because I found when I used maximal
>>warning that I get warning for every automatic inline.
>>
>>I believe that there are functions that it is bad idea to inline like the
>>function to generate promotion because they are called rarely and I guess that
>>the program is slower because it is better to have smaller code for functions
>>that are used rarely.
>>
>>A possible idea is to print the list of all the inlined functions and use
>>force_inline only for part of them that are called often(I do not know about a
>>way to tell the program not to inline a specific fuction when I use inline every
>>suitable).
>>
>>Uri
>
>All is true. With a bit tweakling you can get sometimes 15% extra performance
>out of a chess program.
>
>I do performance measurements for each function with and without inline to see
>what works the best. If I restructure my program a lot because of algorithm and
>structure rewrites then it can happen that the process has to be done all over
>again.

Do you do it for every function?

I think that functions that are done rarely or function that are never done
during the search are obvious functions not to inline.

Uri



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