Dietoad
Dietoad
avoid allocation by reserving space
打开警告选项 红字满天飞 默认执行还会coredump
fix lambda function copy captured variable many times see benchmark for details
with const this code will not compile tsl::sparse_map spp; const auto it=spp.emplace(1,1); it.first->second=1;
avoid bunch memory waste when parse packed repeated field