App loading taking too much time after adding jsdefender metro bundle to react native application.

My application is working just fine but as soon as I add js defender to my application, the app shows a blank screen for a particular period of time, depending on the options provided in the jsconfig file. Even if no option is set in settings, it takes at least 15 seconds to load the app. I am using the latest version 2.6.0 of both js-core and metro.