Thank you for posting query in Microsoft Q&A Platform.
As I understand that the duration of the first web activity in your Azure Data Factory pipeline has increased significantly in the last three days. The web activity is responsible for starting the Integration Runtime, and you have noticed that it now takes between 30 and 35 minutes to complete, whereas it used to take only 2 to 3 minutes.
One possible reason for this issue could be related to the performance of the Integration Runtime. You may want to check the status of the Integration Runtime and ensure that it is running correctly. You can do this by navigating to the Integration Runtimes section in your Azure Data Factory and checking the status of the Integration Runtime associated with your pipeline. You can also check the logs for the Integration Runtime to see if there are any errors or warnings that could be causing the issue.
Also, check the pipeline metrics, performance and configuration to see if there are any spikes in activity that might be causing the delay.
I hope this helps! Let me know if you have any further questions.