处理时间ajax

In Ajax is possible to calculate the processing time of the request? For example, if the extraction of data takes less than 3 seconds, to display a message and to enroll in logs by ajax. If possible you show me an example. P.S. Sorry for my bad english

To get response time you can try something like this but as per this example you have to use jQuery.

var starttime = new Date().getTime();

jQuery.get('your-url-goes-here', data, 
    function(data, status, xhr) {
        var requesttime = new Date().getTime() - starttime;
    }
);

You may want to use timers :

function ajaxFunction() {
    var startTime = new Date().getTime();

    $.ajax({
        type: "POST",
        url: "url.php",
        data: {},
        success: function(ret) {
            // script is done
            var endTime = new Date().getTime();
            var totalTime = endTime - startTime; // this is in milliseconds

            if (totalTime >= 3000) {
                console.log("Script took " + totalTime + " ms" );
            }
        }
    })
}

Note that getTime() returns milliseconds. So you'll have to check for 3000ms = 3s