ring/util.go WaitRingStability slow to respond #96
Description
In Cortex the test TestStoreGateway_InitialSyncWithWaitRingStability/shuffle_sharding_strategy,_20_gateways,RF=3,SS=3(bucket_index_enabled=_false)
takes 30 seconds. And most of it is spent in WaitRingStability, which is weird as everything runs locally in the same process.
Goal: improve the responsiveness of the function if possible