How is Rust cost more memory than C again? Also as shown by TechEmpower benchmark, in "webdev" field, C/C++ doesn't have proper/official driver to Postgres wit

How is Rust cost more memory than C again? Also as shown by TechEmpower benchmark, in "webdev" field, C/C++ doesn't have proper/official driver to Postgres with pipelined support, thus even lose to Java in the fortunes benchmark. Nowadays, they are using a fork of libpq with batch API that has not been merged for 6 years in order to compete. So, lacking of good library support in "webdev" field will put C/C++ at extreme disadvantages compare to other "webdev"-friendly languages.