Why is my .Net 4.7.2 application running quickly on a Virtual machine, but slow in some areas when run on a Azure App Service of the same scale?

Thomas Baxendale 60

I have a .Net 4.7.2 application that runs perfectly locally and when running on a virtual machine, but is sluggish on some pages when hosted on an app service regardless of scale. What is causing this?

I have checked whether it could be database latency, but this wasn't the issue. I've tried moving the site to it's own server too check if it was some kind of resource contention, this wasn't the issue either. It seems to be just the fact that I am hosting on an Azure App Service.

Thomas Baxendale 60 Reputation points

2024-09-17T13:09:47.47+00:00
THIS IS A DUPLICATE, LOOK AT THE COMMENT BELOW FOR MORE INFO

Some more information:

We have tried upscaling the App Service Plan from a P0V3 all the way to P2V3 and this makes no difference.

We have made sure the database and application are in the same region

We have checked the CPU and memory and none of that seems to be an issue.

This works completely fine on other hosting solutions
Thomas Baxendale 60 Reputation points

2024-09-17T13:38:29.08+00:00
Additional Information:

We tried upscaling the app service from a P0V3 to a P2V3 temporarily, no change

We tried running this locally with the same config and it runs way better on a local laptop than on the premium plan.

We have checked the CPU and memory and none of that seems to be an issue.

We have made sure the database and application are in the same region

We added telemetry into the application to see if some databases calls were dragging out, but that didn't appear to be the issue:

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Why is my .Net 4.7.2 application running quickly on a Virtual machine, but slow in some areas when run on a Azure App Service of the same scale?

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