Thank you, Dave, for seeing the (inadvertently placed and) disruptive say in the sub wrapper. I didn't mean for it to be in there, and it certainly would throw off the results. It's been a long day here...

Yes, the results do change with a larger data set and a better hash algorithm:

                    Rate      isSubset isSubsetSmarter    isSubsetHash
isSubset         59189/s            --            -48%            -54%
isSubsetSmarter 112912/s           91%              --            -13%
isSubsetHash    129049/s          118%             14%              --

[download]

Interestingly, if I change do { $count-- when @big } for @small; to do { $count-- if $_ ~~ @big } for @small; in isSubsetSmarter, the following results are produced:

                    Rate      isSubset isSubsetSmarter    isSubsetHash
isSubset         59390/s            --            -50%            -54%
isSubsetSmarter 118219/s           99%              --             -9%
isSubsetHash    129268/s          118%              9%              --

[download]

It becomes apparent now, however, that using a hash for larger data sets in these cases improves performance.

In reply to Re^3: Computing Subsets by Kenosis
in thread Computing Subsets by grandpascorpion

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