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There are at least two reasons that I can think of..
  1. caller:
    sub whoami { print +(caller 1)[3], $/ } + *main::foo = sub { whoami() }; + foo(); __END__ main::__ANON__
  2. DProf:
    *main::foo = sub { sleep 1; }; + foo() for 1..5; __END__ $ perl -d:DProf foo.pl $ dprofpp tmon.out Total Elapsed Time = 5.00996 Seconds User+System Time = 0 Seconds Exclusive Times %Time ExclSec CumulS #Calls sec/call Csec/c Name 0.00 - -0.000 5 - - main::__ANON__
When you have a lot of different anonymous subs floating around, it's a pain in the butt to profile, because all calls to anonymous subs land in main::__ANON__ as far as DProf is concerned.

There's a trick involving local *__ANON__, which works for caller but not DProf.

blokhead


In reply to Re^2: Naming Anonymous Subs by blokhead
in thread Naming Anonymous Subs by fluffy

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