func NewEndpointPortCache() *EndpointPortCache {
	return &EndpointPortCache{
		items: map[endpointsliceutil.PortMapKey]EfficiencyInfo{},
	}
}

// Set updates the EndpointPortCache to contain the provided EfficiencyInfo
// for the provided PortMapKey.
func (spc *EndpointPortCache) Set(pmKey endpointsliceutil.PortMapKey, eInfo EfficiencyInfo) {
	spc.items[pmKey] = eInfo
}

	netutils "k8s.io/utils/net"
)

// addrTypePortMapKey is used to uniquely identify groups of endpoint ports and
// address types.
type addrTypePortMapKey string

// newAddrTypePortMapKey generates a PortMapKey from endpoint ports.
func newAddrTypePortMapKey(endpointPorts []discovery.EndpointPort, addrType discovery.AddressType) addrTypePortMapKey {
	pmk := fmt.Sprintf("%s-%s", addrType, endpointsliceutil.NewPortMapKey(endpointPorts))

			endpoints, existingSlicesByKey[portKey], desiredEndpoints, d.portsByKey[portKey], portKey.addressType())

		slices.append(pmSlices)
		totals.add(pmTotals)

		epMetrics.Set(endpointsliceutil.PortMapKey(portKey), metrics.EfficiencyInfo{
			Endpoints: numEndpoints,
			Slices:    len(existingSlicesByKey[portKey]) + len(pmSlices.toCreate) - len(pmSlices.toDelete),
		})
	}