Different attempts to find order of visible elements in a form with jQuery

gistfile1.js

var f = $("#form");

// attempt 1: average abbout 2.621 seconds
(function(){
i = 0;
j = 0;
start = new Date().getTime();
for(j = 0; j < 1000; j++){
f.find(':visible').find("input,select,textarea,button").not("[type=hidden],[type=submit]").map(function() { return { order: i++, name: $(this).attr("name") }; } );
}
end = new Date().getTime();
return (end-start)/1000;
})();

// attempt 2: average about 0.221 seconds
(function(){
i = 0;
j = 0;
start = new Date().getTime();
for(j = 0; j < 1000; j++){
f.find("input:visible,select:visible,textarea:visible,button:visible").not("[type=hidden],[type=submit]").map(function() { return { order: i++, name: $(this).attr("name") }; } );
}
end = new Date().getTime();
return (end-start)/1000;
})();

// attempt 3: average about 0.261 seconds
(function(){
i = 0;
j = 0;
start = new Date().getTime();
for(j = 0; j < 1000; j++){
f.find("input[type!=hidden][type!=submit]:visible,select[type!=hidden][type!=submit]:visible,textarea[type!=hidden][type!=submit]:visible,button[type!=hidden][type!=submit]:visible").not("[type=hidden],[type=submit]").map(function() { return { order: i++, name: $(this).attr("name") }; } );
}
end = new Date().getTime();
return (end-start)/1000;
})();