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If it would make all function calls slower, then I agree with you that it wouldn't be worth it.

3 times slower...

sub withNames{ local %_ = @_; ++$_{$_} for keys %_; };; sub sansNames{ ++$_ for @_; };; cmpthese -1,{a=>q[ withNames( 1 .. $_*2 ) for 1..5 ], b=>q[ sansNames( + 1..$_ ) for 1 .. 5 ] };; Rate a b a 32135/s -- -75% b 127549/s 297% --
hash could be built when first used... Would that not be technically feasible?

Feasible, yes.

A good idea? Sounds like a recipe for disaster to me.

And all to save you adding local %_ = @_; where you want it. Worth the effort? Absolutely not.


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^5: Why doesn't Perl provide %_ as the hash equivalent of @_ in subs? (ugly++) by BrowserUk
in thread Why doesn't Perl provide %_ as the hash equivalent of @_ in subs? by smls

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