If your requests are stored in hash references, you could easily build yourself a FIFO queue with a simple array of hashrefs, using push to insert a new request and shift to pick up the oldest one (or possibly using pop and unshift). But using existing CPAN modules is probably better.

In reply to Re: Handling multiple requests in a queue on FIFO based and process by Laurent_R
in thread Handling multiple requests in a queue on FIFO based and process by mvinayk

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