Facebook uses the concept of adaptative LIFO for queues:
– They use FIFO order under normal conditions
– They switch over to LIFO order under high loadThe rationale? By keeping FIFO order under high load, users may have already abandoned their request.
Therefore, processing… https://t.co/9l31PsqGHU
— Teiva Harsanyi (@teivah) https://twitter.com/teivah/status/1645362443986640896?ref_src=twsrc%5Etfw
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cesar