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Profiles calls to jQuery(selector), so that you can see which calls to jQuery are taking time.

Call $.profile.start() to start profiling calls to $(selector), and then $.profile.done() to stop profiling and print out something like this:

Selector Count Total Avg+/-stddev script, script, scri... 100 101ms 1.01ms+/-1.01 script 200 58ms 0.29ms+/-0.53 html body #output 100 55ms 0.55ms+/-0.74 script, #output 100 54ms 0.54ms+/-0.73 #output 100 6ms 0.06ms+/-0.24

You can also include the ?jquery.profile.start query parameter in your page URL to begin profiling automatically as soon as the plugin is loaded.