// we need to keep track of whether it was set at the *start* of the sync.
	tryPartialSync := !proxier.needFullSync

	// Keep track of how long syncs take.
	start := time.Now()
	defer func() {
		metrics.SyncProxyRulesLatency.Observe(metrics.SinceInSeconds(start))
		if tryPartialSync {
			metrics.SyncPartialProxyRulesLatency.Observe(metrics.SinceInSeconds(start))
		} else {