One or more computer processors compile a list of asynchronous web calls associated with a retrieved webpage. The one or more computer processors map each asynchronous web call in the list of asynchronous web calls with one or more respective HTML snippets. The one or more computer processors identify content associated with the one or more mapped HTML snippets. The one or more computer processors dynamically suspend one or more asynchronous web calls utilizing a trained model and the identified content, wherein suspending the web call prevents the web call from modifying the retrieved webpage.