Core maintainer of Swiftide here. That's a fair comment! Additionially, it's interesting to note that almost all the time is spend in FastEmbed / onxx in the Swiftide benchmark. A more involved follow up with chunking and transformation could be very interesting, and anecdotally shows far bigger differences. We did not have the time yet to fully dive into this.
Personally, I just love code being fast, and Rust is incredible to work with. Exceptions granted, I'm more productive with Rust than any other language. And it's fun.