How much does these settings affects speed?

[ckissi]

I wonder how much does this affects the speed of the Nginx. Anybody measured this?

[dvershinin]

@ckissi there's no exact measuring of performance penalty, but you can imagine based on the following:

In the worst case, there will be a valid visitor with Referer starting with the letter z. Since this blocker is regex-based, that single request may evaluate up to 4 thousand regular expressions sequentially.

I wrote up an article on the better approach that reduces regular expressions to 1.