Hi: I was trying to figure out how to imporve rgw performance , and I found std::locale comsuming a lot of cpu . Is this normal ? which part of rgw is using this? 18.99% libstdc++.so.6.0.19 [.] std::use_facet<std::ctype<char> > 18.59% [kernel] [k] native_queued_spin_lock_slowpath 8.32% libstdc++.so.6.0.19 [.] std::locale::locale 5.72% libstdc++.so.6.0.19 [.] std::locale::~locale 2.49% libstdc++.so.6.0.19 [.] std::num_put<char, std::ostreambuf_iterator<char, std::char_traits<char> > >::_M_insert_int<long> 2.36% libstdc++.so.6.0.19 [.] std::has_facet<std::num_put<char, std::ostreambuf_iterator<char, std::char_traits<char> > > > 2.22% libstdc++.so.6.0.19 [.] std::use_facet<std::num_put<char, std::ostreambuf_iterator<char, std::char_traits<char> > > > 2.00% libstdc++.so.6.0.19 [.] std::has_facet<std::num_get<char, std::istreambuf_iterator<char, std::char_traits<char> > > > 1.79% libstdc++.so.6.0.19 [.] std::use_facet<std::num_get<char, std::istreambuf_iterator<char, std::char_traits<char> > > > 1.47% libstdc++.so.6.0.19 [.] std::num_put<char, std::ostreambuf_iterator<char, std::char_traits<char> > >::_M_insert_int<unsigned long>