Others have made good suggestions regarding algorithm and scope, but for a more complex program you could use Devel::MAT to identify which structures are using the most memory.

See also https://tech.binary.com/tracing-perl-memory-leaks-with-devel-mat/ and https://tech.binary.com/tracing-perl-memory-leaks-with-devel-mat-part-2/

In reply to Re: Reduce RAM required by swl
in thread Reduce RAM required by onlyIDleft

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