As I said, there isn’t much. What I meant is that if one digs, one may be able to find scattered comments, but nothing very structured, nor specifically about performance
- A bit here, especially for packet loss: 11.6. Statistics — Suricata 8.0.0-dev documentation
- Some bits here tackle blocked traffic, which could impact performance: My traffic gets blocked after upgrading to Suricata 7
- this section hints on what can be learned from
stream.reassemblycounters: 11.3. Tuning Considerations — Suricata 8.0.0-dev documentation
And so on.
But, once again, it’s a documentation area that welcomes more contribution efforts. 