https://perf.webkit.org/#mode=charts&chartList=%5B%5B%22mac-mountainlion%22%2C%22Dromaeo%2Fjslib-event-prototype%3ARuns%22%5D%2C%5B%22mac-lion%22%2C%22Dromaeo%2Fjslib-event-prototype%3ARuns%22%5D%5D&days=168&zoom=%5B1374309311646.923%2C1374932818839.7363%5D WebKit: http://trac.webkit.org/log/?rev=153297&stop_rev=153112&verbose=on Also see bug 125948.
*** This bug has been marked as a duplicate of bug 125948 ***