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#!/usr/bin/env perl

use v5.36;

use List::Util qw /pairs pairvalues pairmap/;

2500050000
2500050000
...
a_pair_vals    513/s          951%    906%   243%     188%        81% 
+    5%          --      -12%       -38%
a_pairmap      582/s         1091%   1041%   289%     226%       105% 
+   19%         13%        --       -30%
a_for_list     827/s         1594%   1521%   453%     364%       191% 
+   69%         61%       42%         --

$ perl -v | head -2 | tail -1
This is perl 5, version 36, subversion 0 (v5.36.0) built for cygwin-th
+read-multi

$ uname -a
CYGWIN_NT-10.0 titan 3.2.0(0.340/5/3) 2021-03-29 08:42 x86_64 Cygwin