I am attempting to analyse the poor performance of an Azure Function when under load. This is a .NET 8 Isolated Function App (v4) running on Windows (64 bit). A small but significant number of requests lead to the behaviour shown below, where there appears to be some kind of overhead between the Http Trigger Function being called and the request being processed.

I am attempting to analyse the poor performance of an Azure Function when under load. This is a .NET 8 Isolated Function App (v4) running on Windows (64 bit). A small but significant number of requests lead to the behaviour shown below, where there appears to be some kind of overhead between the Http Trigger Function being called and the request being processed.