1. A computer-implemented method comprising: determining, by a queue processor, a grouping parameter value associated with a particular queue entry; determining, by the queue processor, whether another queue entry (i) has a same grouping parameter value as the particular queue entry, (ii) has a lower queue entry identifier than the particular queue entry, and (iii) is designated as not completed; and determining, by the queue processor, whether the particular queue entry is dispatchable based on determining whether another queue entry (i) has the same grouping parameter value as the particular queue entry, (ii) has a lower queue entry identifier than the particular queue entry, and (iii) is designated as not completed.