Consul-dataplane sidecar Access log duration units

Hi, I have enabled Access log for consul-dataplane sidecars. I am looking at “duration” values in the logs and most of them are 6-digits numbers. I have a latency issue and that is why turned to logs to get some visibility, but the latency that I am experiencing is not as 300000 milliseconds per almost each request as it is shown in the log. So my question to anybody who can be certain of that: in what units are the duration value numbers? Milliseconds or nanoseconds?
Thank you in advance.