Today i have a application that send mails and this applications need to
know when the user has opened the mail, its kind easy do this sending a
id in some image file requested from the user
mail(src="www.sample.com/image&id=1212").

But this need to be veryyyy fast.

Actually testing on my notebook, apache could serve some image 7000
times a second, using em-proxy poiting to the same apache server, i
could only get 2000 times a second, and i did nothing on em-proxy, just
get from one side and send to another.


Have any way to this faster?
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