testServer.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title></title>
</head>
<body>
<script>
    var id=7467;
    var num=0;
    var cDate=new Date();
    var timeStart=cDate.getTime();
    var xhr = new XMLHttpRequest();
    xhr.onreadystatechange = function () {
        if (xhr.status == 200 && xhr.readyState == 4) {
            console.log(JSON.parse(xhr.responseText));
            num++;
            id=id+2;
            if(num<10){
                xhr.open('GET', "/data/modelData/"+id+".json");
                xhr.send();
            }else{
                var cDate=new Date();
                var timeEnd=cDate.getTime();
                var loadTime=timeEnd -timeStart;
                console.log("group time:"+ loadTime);
            }
        }
    };
    xhr.open('GET', "/data/modelData/"+id+".json");
    xhr.send();
</script>
</body>
</html>