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In general, the more HTTP requests your web page makes the slower it will load. A browser is limited to opening only a certain number of simultaneous connections to a single host. To prevent bottlenecks, the number of individual pages elements are reduced using resource consolidation whereby smaller files, such as images, are bundled together into one file. This reduces HTTP requests and the number of round trips required to load a webpage. Making fewer HTTP requests turns out to be the most important optimization technique, with the biggest impact. If your time is limited, and you can only complete one optimization task, pick this one.