The maximum delay required for two consecutive clicks to be interpreted as a double-click is not standardized.
Generally the events are fired by the browser, and the browser again uses whatever is set in the OS.
According to Microsoft, the default timing in Windows is 500ms (one half second), other operating systems can have other delays, and most have settings that can be changed by the user.
For jQuery, it's in the documentation, the values for the animation speed is as follows
fast : 200
normal : 400
slow : 600
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