// used. Currently we advertise support 5k nodes and 10k
		// namespaces; a 32k entry cache is therefore a 2x safety
		// margin.
		cache: newStripedCache(32, fnvHashFunc, func() cache { return newSimpleCache(clock) }),

		hashPool: &sync.Pool{
			New: func() interface{} {
				return hmac.New(sha256.New, randomCacheKey)
			},
		},
	}
}