strawberry-perl-5.16.3.1-64bit-portable     @ 46.90/s 
strawberry-perl-5.18.4.1-64bit-portable     @ 45.66/s 
strawberry-perl-5.20.3.3-64bit-portable     @ 42.60/s 
strawberry-perl-5.22.3.1-64bit-portable     @ 45.56/s 
strawberry-perl-5.26.3.1-64bit-portable     @ 52.31/s 
strawberry-perl-5.28.2.1-64bit-portable     @ 50.53/s 
strawberry-perl-5.30.2.1-64bit-portable     @ 49.05/s 
strawberry-perl-5.32.1.1-64bit-PDL          @ 47.72/s 
strawberry-perl-5.38.0.1-64bit-PDL          @ 43.94/s 
strawberry-perl-5.40.0.1-64bit-PDL          @ 41.68/s
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FWIW, I benchmarked the solutions + my own, then feeling guilty of still sitting with 5.32, re-ran under 5.40, got ~25% speed drop; though it's less (above is a collage of dir/b + script output) for simplified test below. Isn't it too much?

use strict;
use warnings;
use Benchmark 'timethis';

my $s = do { local $/; <DATA> };
$s x= 10_000;

timethis -5, sub { my @a = split /^(?=>>> )/m, $s; return }, $^V;

__DATA__
>>> prd1701
Filesystem                                  Size  Used Avail Use% Moun
+ted on
/workspace                                  3.9T  887G  3.0T  13% /wor
+kspace/data
>>> prd1702
Filesystem                                  Size  Used Avail Use% Moun
+ted on
/workspace                                  3.9T  746G  3.1T  23% /wor
+kspace/data
>>> prd1703
Filesystem                                  Size  Used Avail Use% Moun
+ted on
/workspace                                  3.9T  687G  3.2T  18% /wor
+kspace/data
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