Not a bug but a query on why my code is slow

A query loading all documents from a single partition on a container is very slow. 1481 documents, all of the same type. 6 MB of data takes between 1.5 seconds on my laptop with 200Mbps internet. Would I expect this query to be so slow?

This is a cut down version of the code:

            var requestOptions = new QueryRequestOptions()
            {
                MaxBufferedItemCount = -1,
                MaxItemCount = -1,
                PartitionKey = new PartitionKey(partitionKey.ToString()),
            };

            var setIterator = container
                .GetItemLinqQueryable<T>(false, requestOptions: requestOptions).ToFeedIterator();
            
            var list = new List<T>();

            while (setIterator.HasMoreResults)
            {
                var response = await setIterator.ReadNextAsync().ConfigureAwait(false);
                list.AddRange(response);
            }

            // takes 2 to 4 seconds to get here

The execution time is all spent running the ReadNextAsync function.

Here are query stats from the COSMOS page on Azure:

Thank you.

[simonziegler]

Will do and thank you

[ealsur]

using var response = await iterator.ReadNextAsync().ConfigureAwait(false);
Console.WriteLine(response.Diagnostics.ToString());

Reference: https://learn.microsoft.com/en-us/azure/cosmos-db/sql/troubleshoot-dot-net-sdk-slow-request?tabs=cpu-new#capture-diagnostics