I don't think make_shared / make_unique is part of c++11 (and ceph is using that). It is part of c++14 I guess.. Thanks & Regards Somnath -----Original Message----- From: Casey Bodley [mailto:cbodley@xxxxxxxxxx] Sent: Thursday, December 03, 2015 7:17 AM To: Sage Weil Cc: Somnath Roy; Samuel Just (sam.just@xxxxxxxxxxx); ceph-devel@xxxxxxxxxxxxxxx Subject: Re: queue_transaction interface + unique_ptr + performance Hi, To those writing benchmarks, please note that the standard library provides std::make_shared() as an optimization for shared_ptr. It creates the object and its shared storage in a single allocation, instead of the two allocations required for "std::shared_ptr<Foo> fs (new Foo())". Casey ----- Original Message ----- > 1- I agree we should avoid shared_ptr whenever possible. > > 2- unique_ptr should not have any more overhead than a raw > pointer--the compiler is enforcing the single-owner semantics. See > for example > > https://msdn.microsoft.com/en-us/library/hh279676.aspx > > "It is exactly is efficient as a raw pointer and can be used in STL > containers." > > Unless the implementation is broken somehow? That seems unlikely... > > sage > > -- > To unsubscribe from this list: send the line "unsubscribe ceph-devel" > in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo > info at http://vger.kernel.org/majordomo-info.html > ��.n��������+%������w��{.n����z��u���ܨ}���Ơz�j:+v�����w����ޙ��&�)ߡ�a����z�ޗ���ݢj��w�f
