CODEWITHSUNDEEP
javascriptajax
Jared
Jared

Reputation: 3016

Why does the time taken for AJAX request jump from 2ms to 50ms and higher?

I wrote a small script (with jQuery for AJAX) to "ping" the server and output how long it takes for my AJAX requests to occur.

var start = Date.now(), end = 0;

setInterval(function() {
    $.ajax('', {
        complete: function() {
            end = Date.now();

            console.log(end - start);
        }
    });
}, 1000);

This is the kind of pattern I'm getting:

39
2
4
2
3
40
3
2
3
4
2
61
9
4
3
2
2
4
34

etc.

Why does the "ping" jump from a low number (2, 3, 4, etc.) to a higher one (40, 50, 60) in such a pattern? Is there an obvious reason or should I just blame it on HTTP/AJAX technology?

Upvotes: 1

Views: 121

Answers (1)

Anarion
Anarion

Reputation: 1038

Those requests with about 40ms in your example are real requests. Others are cached results by browser.

Upvotes: 3

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