This extension killed my webapp performance about applicationinsights-owinextensions HOT 5 CLOSED

Hi,
Two questions:

1. Do you use any telemetry modules or initializers beyond what the library has in it? Check your ApplicationInsights.config
2. When you use the AI directly, without this lib, do you get 300 req/s? Do you get the same telemetry?

from applicationinsights-owinextensions.

1. I am using just the default ApplicationInsights.config file, haven't added or removed any Initializers

    <TelemetryInitializers>
        <Add Type="Microsoft.ApplicationInsights.DependencyCollector.HttpDependenciesParsingTelemetryInitializer, Microsoft.AI.DependencyCollector"/>
        <Add Type="Microsoft.ApplicationInsights.WindowsServer.AzureRoleEnvironmentTelemetryInitializer, Microsoft.AI.WindowsServer"/>
        <Add Type="Microsoft.ApplicationInsights.WindowsServer.AzureWebAppRoleEnvironmentTelemetryInitializer, Microsoft.AI.WindowsServer"/>
        <Add Type="Microsoft.ApplicationInsights.WindowsServer.BuildInfoConfigComponentVersionTelemetryInitializer, Microsoft.AI.WindowsServer"/>
        <Add Type="Microsoft.ApplicationInsights.Web.WebTestTelemetryInitializer, Microsoft.AI.Web"/>
        <Add Type="Microsoft.ApplicationInsights.Web.SyntheticUserAgentTelemetryInitializer, Microsoft.AI.Web">
                       <Filters>search|spider|crawl|Bot|Monitor|AlwaysOn</Filters>
        </Add>
        <Add Type="Microsoft.ApplicationInsights.Web.ClientIpHeaderTelemetryInitializer, Microsoft.AI.Web"/>
        <Add Type="Microsoft.ApplicationInsights.Web.OperationNameTelemetryInitializer, Microsoft.AI.Web"/>
        <Add Type="Microsoft.ApplicationInsights.Web.OperationCorrelationTelemetryInitializer, Microsoft.AI.Web"/>
        <Add Type="Microsoft.ApplicationInsights.Web.UserTelemetryInitializer, Microsoft.AI.Web"/>
        <Add Type="Microsoft.ApplicationInsights.Web.AuthenticatedUserIdTelemetryInitializer, Microsoft.AI.Web"/>
        <Add Type="Microsoft.ApplicationInsights.Web.AccountIdTelemetryInitializer, Microsoft.AI.Web"/>
        <Add Type="Microsoft.ApplicationInsights.Web.SessionTelemetryInitializer, Microsoft.AI.Web"/>
        <Add Type="ApplicationInsights.OwinExtensions.OperationIdTelemetryInitializer, ApplicationInsights.OwinExtensions"/>

    </TelemetryInitializers>

I am still getting AI telemetry without the library, I wasn't using any of the features the library gives yet but just installing it and adding it to my request pipeline seemed to have the said performance impact. I am not sure if its identical telemetry with and without the library.

It was concerning though that just installing the library had such a big performance impact.

from applicationinsights-owinextensions.

Ok, follow up questions:

1. What is your performance test doing exactly? What endpoints are called and what do they do (simple hello world or actual application code that calls a db, etc.)
2. You need to verify if you get the same telemetry and 300 req/s when not using the lib. Do you get requests and dependencies?

from applicationinsights-owinextensions.

1. Yeah its a simple hello world type of test, just returns a string, no resources like db etc.

        public IHttpActionResult Get()
        {
            return Ok("Hello World");
        }

2. Yes I am getting telemetry, requests, dependencies, exceptions etc

from applicationinsights-owinextensions.

Using a simple "Hello world" may be the reason you see this performance drop. The overhead of creating telemetry is significant compared to super fast operation of returning a string constant. If you ran another test with more real-life endpoint, you'd probably experience less relative perf drop.

That being said, I should also mention the lib was never optimized for performance. I also do not plan any work in this field, because Owin is now superseded with ASP.NET Core pipeline and the problems this lib solved are not present there.

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