Increased latencies when attempting mTLS between DuckDB Httpfs and NGINX Ingress Controller

Hi, I'm wondering if the following impact on latency is expected when using the httpfs extension in Rust?

I am trying to achieve mTLS between DuckDB and a Kubernetes/nginx ingress controller. To do this, I am setting a custom certificate file (https://duckdb.org/docs/stable/extensions/httpfs/https.html#using-a-custom-certificate-file) when opening a connection:

```
SET ca_cert_file = 'ca-certs.crt';
SET enable_server_cert_verification = true;
```

When these settings are enabled, I see request latencies increase by several seconds. Again, is this impact on latency expected?

I've created a reproducible example, which can be found here: https://github.com/zheniasigayev/duckdb-mtls-test