And List::MoreUtils::uniq can be faster as it tries to load a library to implement its functionality via DynaLoader. If that fails it implements a plain perl way.

In my test (linux, perl 5.8.8 List::MoreUtils 0.21) the original List::MoreUtils::uniq is about 400% faster than my perl implementation.

If I rename the library, so List::MoreUtils must rely on its perl implementation, my solution is about 20% - 25% faster.

I don't want to argue against List::MoreUtils; but now I wonder about these two (perl) solutions:

# presented in perlfaq4 - How can I remove duplicate elements from a l
+ist or array?
sub my_uniq {
  my %h;
  grep { !$h{$_}++ } @_;
}

# vs.

# List::MoreUtils::uniq
sub LM_uniq {
  my %h;
  map { $h{$_}++ == 0 ? $_ : () } @_;
}

[download]

I can't recognize an advantage in the usage of map and the ternary operator.

edit: text refined

In reply to Re^3: Remove Duplicates from Array by linuxer
in thread Remove Duplicates from Array by jpk236

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