Luigi Rizzo wrote this message on Fri, Nov 29, 2013 at 17:11 -0800: > On Fri, Nov 29, 2013 at 4:49 PM, Adrian Chadd <adrian_at_freebsd.org> wrote: > > > The reason I wouldn't implement this is to avoid having code that > > _relies_ on this behaviour in order to function or perform well. > > > nobody ever said (or could reasonably expect to do) that. > > Applications don't know if the allocator overallocates, > so they have no hope unless they work even without the feature. > > This is only about giving them an option to improve > performance in those (rare ?) cases where, as i showed, > knowing the underlying allocation size may lead to > better usage of memory. This sounds like optimizing before measuring if your putting in code like that... Either it happens rarely, and always doing a realloc won't hurt performance, or it happens often, and then you should be using a larger buffer in the first place.. Do I need to quote the optimization rules? -- John-Mark Gurney Voice: +1 415 225 5579 "All that I will do, has been done, All that I have, has not."Received on Sun Dec 01 2013 - 01:20:06 UTC
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