I tried
$(document).ready(function() {
$('body').off('.data-api');
});
on javascript.html (where the whole javascript plugin is called): https://github.com/twitter/bootstrap/zipball/master
data-api off:
there are 16026 calls and 226.998ms are required

data-api on (source file):
the same number of calls and takes about the same time

Conclusion
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