The driver's multi-query performance in the multi-query TechEmpower benchmark is significantly lower than that of the axum [postgresql-deadpool] benchmark, which it typically beats. We should investigate why this is the case and see if there are any potential improvements to be made to the driver and/or benchmark implementation.

As a side note: the actix-web-pg-deadpool version of this benchmark (which I wrote) is also much slower than the corresponding axum one. We should investigate that as well, since that indicates a possible bug in the implementation.

Results for all Rust frameworks: https://www.techempower.com/benchmarks/#section=data-r21&test=query&l=yyku7z-6bj

Among MongoDB drivers: https://www.techempower.com/benchmarks/#section=data-r21&test=query&d=e