[snip]
> what I think we have here, is that  $('#cat') is expensive, and run
> inside a loop in dojBuild
>   
you can build and append in the jquery version and it only shaves 10ms. 
ie the following still incurs the jquery html building function call costs:

function dojBuild(){
    var o ='';
    for(var i =0 ;i < repetCount;i++){
        o+=$('<span/>')
            .attr({
                'id'    : i,
                'class'    :'fish'
            })                       
        .append( $('<p/>')
                .attr({
                    'class'    :'dog',
                    'rel'     : 'foo'
                })
            .text( i )
        ).html()
    }
    $('#cat').append(o);
}


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