Antonio Macrì

Maybe related to #654?

I digged a bit deeper. There are two kind of problems: 1. Comparison of proto Messages performed using `ShouldResemble`, which is unreliable. 2. Rendering of failed comparison for proto Messages,...

Thanks @KarlHeitmann! I'm not using this for now, but I'll let you know if I will encounter any issue.

Also, it's not clear to me how that metric (`ActorMailboxLength`) should work. Shouldn't it sum the mailbox length for all the living actors? It instead seems to replace the gauge...

I'm keen to help with this issue. Any hint on how to fix the leak and correctly implement the mailbox metric?

It should be due to the registered callback for _each actor_, which keeps references to its mailbox and context via the closure. So changing the callback logic should also fix...

I'm also very interested in this issue, or the simpler version which just adds people without markers. Have you evaluated or found problems on [kvalev proposal](https://github.com/kvalev/photoprism/pull/51)? How could anyone help?