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Interesting. Here are the results of your benchmark (-Set::Scalar) run using my default perl (5.10.1 64-bit):

C:\test>1064178-b.pl
                 Rate listCompare OPdiff hash_grep OPdiffModified OPdi
+ff_undef using_vec
listCompare    12.9/s          --   -86%      -93%           -94%     
+    -94%      -95%
OPdiff         95.1/s        639%     --      -48%           -52%     
+    -53%      -65%
hash_grep       185/s       1334%    94%        --            -8%     
+     -9%      -32%
OPdiffModified  200/s       1452%   110%        8%             --     
+     -2%      -27%
OPdiff_undef    203/s       1478%   114%       10%             2%     
+      --      -26%
using_vec       273/s       2019%   187%       48%            37%     
+     34%        --
[download]

And this using 5.18 64-bit (also minus List::Compare):

C:\test>\perl5.18\bin\perl 1064178-b.pl
                Rate     OPdiff  using_vec hash_grep OPdiffModified OP
+diff_undef
OPdiff         126/s         --       -22%      -31%           -43%   
+      -44%
using_vec      162/s        28%         --      -12%           -26%   
+      -28%
hash_grep      183/s        45%        13%        --           -17%   
+      -19%
OPdiffModified 220/s        74%        36%       20%             --   
+       -2%
OPdiff_undef   225/s        79%        39%       23%             2%   
+        --
[download]

They've really screwed up vec. ( Along with substr and a bunch of others :( )

With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.

"Science is about questioning the status quo. Questioning authority".

In the absence of evidence, opinion is indistinguishable from prejudice.

In reply to Re^2: Best method to diff very large array efficiently by BrowserUk
in thread Best method to diff very large array efficiently by newbieperlperson

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