On 09/21/2016 08:35 PM, Georg Gast wrote:
Am 21.09.2016 um 19:36 schrieb Bjorn Reese:
The Boost archives use iostreams, whereas cstyle uses memcpy.
Yes, thats clear. :)
I am not sure how to interpret your response. My statement was not a casual observation about your tests, but the main explanation for the difference in performance.
That is one of the reasons why my own archives, unlike the ones that are part of Boost.Serialization, are constructed to serialize directly to/from other container types such as arrays, std::string, and std::vector.
I just found out one issue on Windows: static void to_wire_xml(benchmark::State& state) { //std::locale::global(std::locale("C")); while (state.KeepRunning()) { boost_test<boost_xml_trait>::to_wire(ev_test()); } } If i toggle the commented line, the cost goes down to the half. With the Windows profiler i found out, that the construction of the locale takes so much time. Without global set locale: Benchmark Time(ns) CPU(ns) Iterations ---------------------------------------------- to_wire_xml 78066 77177 7479 from_wire_xml 95638 95949 7479 With global set locale: 09/22/16 08:32:49 Benchmark Time(ns) CPU(ns) Iterations ---------------------------------------------- to_wire_xml 41399 41302 16619 from_wire_xml 52841 52844 11218 Thats amazing! Thats the Level of the Linux implementation. One riddle is solved :)