Upgrading to .net8.0 we noticed a major drop in the performance of the library regarding the time response when we call the URL for the metrics. Especially for services that do DNS resolve a lot. It can take like 30 secs or one minute to get the full response of the /metrics page.

I tried to trace the code and I noticed that the method "WriteMetricPointAsync" is called like 27k times, while handling the node "system_net_nameresolution_dns_lookup_duration_bucket"