Since extending a class means including on the singleton class of the
class, this should now complain this:
``` ruby
module M
extend Gitlab::Utils::Override
override :f
def f
super.succ
end
end
class C
extend M
def self.f
0
end
end
```
It should complain because `C.f` wasn't calling `M#f`.
This should pass verification:
``` ruby
module M
extend Gitlab::Utils::Override
override :f
def f
super.succ
end
end
class B
def self.f
0
end
end
class C < B
extend M
end
```
Because `C.f` would now call `M#f`, and `M#f` does override something.
The Gitaly CommitService is being hammered by n + 1 calls, mostly when
finding commits. This leads to this gRPC being turned of on production:
https://gitlab.com/gitlab-org/gitaly/issues/514#note_48991378
Hunting down where it came from, most of them were due to
MergeRequest#show. To prove this, I set a script to request the
MergeRequest#show page 50 times. The GDK was being scraped by
Prometheus, where we have metrics on controller#action and their Gitaly
calls performed. On both occations I've restarted the full GDK so all
caches had to be rebuild.
Current master, 806a68a81f, needed 435 requests
After this commit, 154 requests
