@David Pedraza Verdugo This is a very difficult issue to troubleshoot in a public forum due to there being 1,000+ variables. I will send you a private message asking for more details so we can try to take a deeper look but do note that we may not be able to locate an answer.
With that being said, I'll try to hit up some of the common scenarios while I wait for your reply based on the details you have provided.
- Are the apps in the same region as the databases? Please note for example that East US and East US2 are different datacenters and are located a minimum of 500 miles apart. This can add latency to the database calls. The web app needs to be in the exact same region as your database.
- Have you tried using a browser trace to observe where the loading time for each site is spent? Is it taking 50 seconds to load a picture on the site? Where is that picture hosted? In the site files? In a database?
- Have you tried using the 'diagnose and solve' blade on the slower web app? This blade has detectors that Microsoft support engineers use to help locate issues. It can be a very powerful tool to shedding light on issues with your app.
Lastly, we just announced the availability of Pv3 on October 1st. If you're concerned about power, you may want to check this out.