1. A computer-implemented method for reconfiguring a web page using a computer to reduce load time of the web page required when viewing the web page through a browser, the method comprising the steps of: extracting dependencies between (i) pages, (ii) files, and (iii) components of the web page stored in a storage unit of the computer; measuring (i) a network delay value, (ii) a transfer efficiency value, and (iii) a component size; estimating load time of a candidate file using information of (i) the network delay value, (ii) the transfer efficiency value, (iii) the dependencies, and (iv) the component size; generating an integer programming problem using the information of the candidate file, wherein the integer programming problem minimizes an object function representing the load time of the web page by analyzing the web page and generating a (i) dependency, (ii) an inclusion relationship and (iii) a loading relationship in the form of a 0-1 table; solving the integer programming problem using a solver; reconfiguring a library file from a solution to the integer programming problem obtained by the solver; reconfiguring the web page by replacing a link to the library file of each page with a link to the reconfigured library file; and wherein, at least one step is carried out using a computer device.