Code TIPS Link này có tôi ưu hóa ko?

$(function(){
childElement={};
numElement=0;
$('a').hover(function(){
numElement++;
childElement[numElement]=$(this);
//add Element HTML
ref=$(this).attr('href');
name=$(this).text();
tops=$(this).offset().top;
left=$(this).offset().left;
width=$(this).outerWidth();
height=$(this).outerHeight()+5;
if(ref){
ref=ref;
}else{
ref='Không xác định';
}
if(width<=120){
classes='small';
}else{
classes='big';
}
$('body').append('<div class="over_num_'+numElement+' tips_by_mad '+classes+'" style="top: '+tops+'px; left: '+left+'px; margin-top: '+height+'px;">'+name+'<br>'+ref+'</div>');
if(childElement[numElement]){
childElement[numElement].mouseleave(function(){
$('div[class*="over_num_"]').remove();
childElement[numElement]='';
});
}
});
 
})

.tips_by_mad{
max-width: 200px;
    padding: 8px;
    color: #ffffff;
    text-decoration: none;
    background-color: #000000;
    -webkit-border-radius: 4px;
    -moz-border-radius: 4px;
    border-radius: 4px;
position: absolute;
z-index: 1000;
}
.tips_by_mad.big:before{
width: 0;
    height: 0;
    border: 6px solid transparent;
    content: '';
    top: -10px;
    left: 50%;
    margin-left: -5px;
    border-bottom-color: #000000;
    border-width: 5px;
    position: absolute;
    border-style: solid;
}
.tips_by_mad.small:before{
width: 0;
    height: 0;
    border: 6px solid transparent;
    content: '';
    top: -10px;
    left: 10px;
    margin-left: -5px;
    border-bottom-color: #000000;
    border-width: 5px;
    position: absolute;
    border-style: solid;
}