id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
24696	CSRF middleware wastefully calculates new tokens that are never used .	Jay Cox	nobody	"When a client requests a page from a site running the csrf middleware and does not send a csrf cookie - a new CSRF token is generated even if the page does not use the token.  This unnecessary token generation can add about 40% to the response time for simple requests.

I have created a pull request with a solution that only generates a csrf token when it is going to be used.

Git hub pull request:
https://github.com/django/django/pull/4550
"	Cleanup/optimization	closed	CSRF	1.8	Normal	fixed	CSRF performance		Ready for checkin	1	0	0	0	0	0