Prevent request.user from being evaluated in middlewares #18913
Merged
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When dealing with a request with auth credentials,
GraphiteMiddleware's default implementation forcesrequest.userto be evaluated to send aresponse.authstatsd ping, causing a database query even if the view didn't use auth at all. We don't need that ping, so replace the middleware with a custom one that doesn't do this, avoiding the database query in those cases.Fixes mozilla/addons#8693