Deferred Causes A Session to be Created for All Page Views

[coofercat]

I've been working with Dancer2 and Deferred for a project. I've noticed that Deferred seems to cause a session to be created for every visitor, even if no deferred message is shown.

This means that every visitor causes a session to be created. In my case it's Redis backed, so the session creation cost is small, and having a large number of sessions in Redis isn't a big burden. However, making a session for a user who (will probably) never need it, and (unless they're in a very small percentage of visitors) will never see a Deferred message seems rather wasteful.

This also causes me a slight issue with the EU cookie laws, in so much as when a visitor arrives at my site, I'll be setting a cookie (the session cookie) at the same time as I'm asking if it's okay to do so.

Is there a way Deferred could avoid creating the session, unless an actual 'deferred' call is made?

[Asuza]

@coofercat were you able to find a solution to your problem?

[coofercat]

No, I didn't - other than "don't use Deferred" :-(