this.entries = carrier is NoopDistributedContextCarrier || entries == null
? Enumerable.Empty<DistributedContextEntry>()
: entries.Where(x => x != default).Distinct();
With bloody fors: (1576613193610, 1576613201547, 00:00:07.9370000)
With repeated enumerations: (1576618954705, 1576618967804, 00:00:13.0990000)