storage? any one of many compression techniques. Think '.zip' or RLE or bit vectors or ....

efficiency? Your usual choices are usually valid, but would you consider them the best measure of the "efficiency" of producing a one-off or rarely used program? Being concerned solely with "cpu and timeUpdate1 consumption" and ignoring "programmer time" might be a serious case of premature optimization.

Update 1: I assume from context that the "time" reference meant "run time."

In reply to Re^3: Populating a hash by ww
in thread Populating a hash by Anonymous Monk

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