What can lead to slow click events?

Question

For some reason, click events on my real server take significantly more time than on my local development machine. For example, here is some basic code that I used as a test:

jQuery(document).ready(function(){
    jQuery('a[rel^="foxyLightbox"]').on("click", function(e) {
        console.log("HA!");
        return false;
    });
});

When I run it locally and click links, the text is displayed on the console pretty much instantly. If I click on it a bunch of times in a row, there will be no lag.

When I run it on my real server, there almost exactly one second is delayed before a fire occurs. If I click on it several times in a row, it means there is a lag, and it gives out about once a second.

Here is an example page https://www.foxytronics.com/products/68-springrc-sm-s4303r-continuous-rotation-servo

The link that triggers the event is an image of a large product in the upper right corner.

At first I thought the problem was in my javascript code, but then I commented on it and used the above test code (which is very short), so this cannot be. What can delay a click event when firing?

Answer 1

I used the chrome dev tools, and I see that you have a weird long mouseDown event handler:

Some work is done in a JS script from static.getclicky.com