Performance 1.9 vs 1.10 when manipulating all rows

I have a table with a checkbox column. I have a toggle all checkboxes at the top to check/uncheck all at once. It's fast in 1.9 but slow in 1.10 so I'm guessing I'm doing it in a less than ideal way... any feedback would be greatly appreciated:

1.9 method:

var rows = reportingTable.$('tr', {filter: 'applied'});
rows.each(function(index) {
     if (target.is(':checked')) {
         reportingTable.fnUpdate(true,this,0,false,false);
    } else {
        reportingTable.fnUpdate(false,this,0,false,false);
    }
});

1.10 method:

var rows = reportingTable.rows({search: "applied"}).indexes().each(function(idx) {
    var d = reportingTable.row( idx ).data();
    d.checked = (target.is(":checked"));
 
    reportingTable.row( idx ).data( d );
});
reportingTable.draw();