Do you have an example of where you’ve found writing raw SQL queries was more efficient in both time spent programming and time spent executing the query?

I built an API in Python and SQLALchemy. Originally, it was built in Flask and Flask-SQLALchemy, but I eventually decided to migrate it to Falcon + SQLService and saw greatly improved response times from my API (hosted on AWS Lambda). Am I likely to see as significant improvements from a switch to Rust + raw SQL queries?

I am kindly looking for a reason to learn Rust. :) With the recent improvements to AWS Lambda, a Rust run-time is a reality and I am open to migrating the project once again for any additional speed improvements.