url_rewrite_concurrency singlethreaded redirector performance?

[Sylvain Viart <sylvain.viart@xxxxxxxxxxxxxxxxx>]

Hi,

In squid 2.6 a new directive raised.

url_rewrite_concurrency

Would than mean we have some performance issue with singlethreaded 
redirector?

Redirector documentation
http://wiki.squid-cache.org/SquidFaq/SquidRedirectors

Regards,
Sylvain.