Django does many things but “efficient” is not one of them.
Django ranks #137 out of #142 across numerous web frameworks and languages. It’s literally one of the least performant options that exist.
Such framework rankings are also utterly irrelevant when you want something widely used enough to easily find contributors and integrations. That restricts you quite a bit more than “any so called framework that just handles http”.
Did you even look at the top performers on that page? This is number 2: https://github.com/Xudong-Huang/may_minihttp
It depends on how you code. I wrote a user instance in django and and I'm happy with it's performance.