in reply to Things I Don't Use in Perl
I think study does as it always did. It analyzes the string and builds a data structure from it such that repeated REs on that string are ever so slightly more efficient in execution time.
Throwing nuclear weapons into the sun
Making everybody on Earth disappear
A threat from an alien with a mighty robot
A new technology or communications medium
Providing a magic fish to a Miss Universe
Establishing a Group mind
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