.Net HTTPClient 第一次请求新客户端很慢，是否可以提高性能

Question

2023-03-30 20:48:52：获取标题所需的时间：501

2023-03-30 20:48:52：获得标题所需的时间：78

2023-03-30 20:48:52：获得标题所需的时间：68

2023-03-30 20:48:52：获得标题所需的时间：63

2023-03-30 20:48:52：获得标题所需的时间：63

2023-03-30 20:48:52：获得标题所需的时间：95

                    test.Start();
                headerResponse = await client.GetFromJsonAsync<ResponseHeaderViewModel>($"GenericSync/GetHeaders?tableName={tableName}&ProjectRef={projectRef}");
                test.Stop();
                logger.Log("The duration it took to get headers: " +test.ElapsedMilliseconds);
                test.Reset();
                test.Start();
                headerResponse = await client.GetFromJsonAsync<ResponseHeaderViewModel>($"GenericSync/GetHeaders?tableName={tableName}&ProjectRef={projectRef}");
                test.Stop();
                logger.Log("The duration it took to get headers: " + test.ElapsedMilliseconds);
                test.Reset(); test.Start();
                headerResponse = await client.GetFromJsonAsync<ResponseHeaderViewModel>($"GenericSync/GetHeaders?tableName={tableName}&ProjectRef={projectRef}");
                test.Stop();
                logger.Log("The duration it took to get headers: " + test.ElapsedMilliseconds);
                test.Reset(); test.Start();
                headerResponse = await client.GetFromJsonAsync<ResponseHeaderViewModel>($"GenericSync/GetHeaders?tableName={tableName}&ProjectRef={projectRef}");
                test.Stop();
                logger.Log("The duration it took to get headers: " + test.ElapsedMilliseconds);
                test.Reset(); test.Start();
                headerResponse = await client.GetFromJsonAsync<ResponseHeaderViewModel>($"GenericSync/GetHeaders?tableName={tableName}&ProjectRef={projectRef}");
                test.Stop();
                logger.Log("The duration it took to get headers: " + test.ElapsedMilliseconds);
                test.Reset(); test.Start();
                headerResponse = await client.GetFromJsonAsync<ResponseHeaderViewModel>($"GenericSync/GetHeaders?tableName={tableName}&ProjectRef={projectRef}");
                test.Stop();
                logger.Log("The duration it took to get headers: " + test.ElapsedMilliseconds);
                test.Reset();

从上面的数据可以看出，同一个请求，第一次执行需要500ms+，不算长，但是我的程序对时间很敏感。是否有可能让第一个请求与所有其他请求相同？ Client是由IHTTPClientFactory生成的httpclient。被调用的 api 在 IIS 下工作。