Does anyone have an idea of what's the impact on a website performances when activating Hotlink protection on server.
FYI: hotlink protection disallows other websites on other servers to place an image on their websites that directly refers to my websites. For instance let's say mywebsite.com is including an img file called test.jpg, anotherwebsite.com can NOT place in its pages this line:
because mywebsite.com server would recognize that such request is not coming from mywebsite.com and stops the request, therefor anotherwebsite.com woudl display nothing in place of the image.
Actually my websites on which I activated Hotlink protection do not seem to run slower. But I'm just wondering waht's behind it, I suppose Apache web server needs to check for every request for an image and see where such request comes from, so in some way it should decrease performances.