Where is the Go code that the blog mentions for improving the performance of the backend?

Where is the source Go code related to the ADA engine?

… the Nextcloud team has rewritten sections of the core file handling and abstraction logic with components in PHP, Go, and Rust.

… the High Performance Backends for both Nextcloud Files and Talk, written in Rust and Go, were improved to push more data directly to clients:

It’s mentioned in the release but nowhere can I find any golang code in Nextcloud · GitHub

Thank you in advance!

That would be the High Performance Backend for Nextcloud Talk AFAIK.