[PATCH v2 2/6] models: Add 'Event' model

[Stephen Finucane]

On Tue, 2017-02-07 at 08:11 +1100, Daniel Axtens wrote:
> Hi Stephen,
> 
> I'm reviewing this series as I get time,

FYI - there's another version of this series coming in the next day or
two that will add some more events. I'll try to account for these
changes in the commit messages but the generic foreign keys are gone.

>  but one general question -
> should any of this be hidden behind a config option? I'm wondering if
> anyone who doesn't want REST or is nervous about the performance
> impact
> might want to turn it off (or at least might want to be able to turn
> it
> off).
> 
> Thoughts?

We /could/, but it would remove a really valuable feature that I plan
to make a lot of use of. This feature is pretty vital for CI systems,
which need a way to quickly identify when patches have been received,
had their dependencies met etc. I also want to expose this lifecycle
information in the UI in a similar pattern to Launchpad, GitHub etc. I
can't imagine this affecting performance in any serious way, given that
it will only be triggered on certain lifecycle events. However, I'm
open to benchmarking this if I can find out how :)

> (Relatedly, I guess a patchwork benchmark might not be a bad idea -
> make
> sure we don't regress catastrophically without noticing...)

Not a bad idea. I wonder how we'd do this?

Stephen