如何使用jquery ajax计算上传文件所需的时间

Question

I want to create a simple script help me for calculate the time is take when I upload a image to the server I have some thing like this

$(document).ready(function(){

    $("#but_upload").click(function(){

        var fd = new FormData();
        var files = $('#file')[0].files[0];
        fd.append('file',files);

        $.ajax({
            url: 'http://uploadtomyapi.com',
            type: 'post',
            data: fd,
            contentType: false,
            processData: false,
            success: function(response){
                // done my calculation here
        });
    });
});

I don't know this is the better way for do it but I am new in this, can some one help me thanks so mush.

Answer 1

Something like this, and then calculate the difference between the start and end value (like mentioned by Taplar above in the comments).

<script>
var startTime, EndTime;
$(document).ready(function () {
    $("#but_upload").click(function () {
        var fd = new FormData();
        var files = $('#file')[0].files[0];
        fd.append('file', files);
        $.ajax({
            url: 'http://uploadtomyapi.com',
            type: 'post',
            data: fd,
            contentType: false,
            processData: false,
            beforeSend: function () {
                startTime = Date.now();
            },
            success: function (response) {
                // done my calculation here
            },
            complete: function () {
                endTime = Date.now();
            }
        });
    });
});
</script>