Asynchronous transactions reported as critical path

An agent executed by a computer identifies a critical path of a transaction in a web application. The transaction includes a plurality of methods each representing an operation of the application and asynchronously executed by a server between a beginning of the transaction and an end of the transaction. The agent receives metrics for the transaction, which include identifiers of each executed method and specify relationships between the transaction methods. Based on the received metrics, the agent identifies a method completed at the end of the transaction. Based on the relationships between the methods, the agent determines one or more other methods preceding the identified method in the transaction and affecting a duration of the transaction. The determined methods and the method completed at the end of the transaction are identified as a critical path. Identifiers of the methods on the critical path are sent for display to a user.