$ perl -MBench -e'$s = "a b"; /(\w+) (\w+)/; bench sub {$a=$1; $b=$2},
+ -1'
3666664 calls (3339959/s), 1.098s (0.0003ms/call)
$ perl -MBench -e'$s = "a b"; /(?<a>\w+) (?<a>\w+)/; bench sub {$a=$+{
+a}; $b=$+{b}}, -1'
636364 calls (560973/s), 1.134s (0.0018ms/call)
$ perl -MBench -e'$s = "a b"; /(?<a>\w+) (?<a>\w+)/; %h=(a=>$+{a}, b=>
+$+{b}); bench sub {$a=$h{a}; $b=$h{b}}, -1'
3333331 calls (3102372/s), 1.074s (0.0003ms/call)
Accessing %+ elements is slower due to some tie magic. In general, yeah, you don't need to worry about it. But I managed to make Org::Parser and Text::sprintfn around twice as fast by avoiding named capture or copying %+ first to a temporary hash instead of accessing invididual %+ elements repeatedly.
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