11. A system for displaying statistics for an application within an application design tool, the system comprising: a design software tool running on a computer that (i) enables a designer to graphically create an application flow using a sequence of nodes that represent functions in the application, and (ii) in response to the designer inputting a design, generates application code based on the design, including inserting markers in the application code that demark boundaries between nodes in the designed application; an execution server that executes the application code, wherein, for each instance of the application executed, the execution server creates a log in accordance with the markers such that data is logged for nodes traversed during the execution of such instance of the application; a database operatively coupled to the execution server for storing the logged data; and an analytics server that (i) obtains the logged data from the database, (ii) calculates statistics for one or more of the nodes using the logged data and (iii) provides such values to the design software tool, wherein the design software tool subsequently displays the nodes in a graphical user interface to display the application flow, prompts the designer to enter threshold values for one or more statistics, identifies the nodes associated with statistics that satisfy the threshold requirements, and displays statistical information, based on the calculated statistics, for only nodes associated with statistics that satisfy one or more threshold requirements, wherein the statistical information comprises at least one of (i) traffic at the node being greater than or equal to a specified amount or percentage of total traffic, (ii) disconnects at the node being greater than or equal to a specified amount or percentage of executions of the node, (iii) errors at the node being greater than or equal to a specified amount or percentage of executions of the node, and (iv) agent requests at the node being greater than or equal to a specified amount or percentage of executions of the node, and wherein nodes associated with statistics that do not satisfy the one or more threshold requirements are displayed without statistical information.
19. The system of claim 11 , wherein the designed application is a web application.