Kresd cache not working at all?

I tried to find out why kresd was sometimes very slow, reading the “documentation” I checked the cache.stats() and only got

[hit] => 0
[delete] => 0
[miss] => 0
[insert] => 3496

are the stats broken? or is the cache just not working at all?

I did not change the resolver config at all…

These stats are normal for kresd 3.2.1 (and many versions before). Cache stats were basically unimplemented, but since the next upstream version (4.0.0) there are more of them: