in reply to
Re: Re: Re: Removing Duplicate Array Elements!!!
in thread Removing Duplicate Array Elements!!!
As you say, the slice method is faster again. I will be using it from now on. Thanks.
use Benchmark;
@a= (0..100,0..100);
$mine = <<'CODE';
my %hash;
@hash{$_}++ for @a;
@a = keys %hash;
CODE
$yours1 = <<'CODE';
my %hash;
@hash{@a} = ();
@a = keys %hash;
CODE
$yours2 = <<'CODE';
my %hash;
@hash{@a} = @a;
@a = values %hash;
CODE
$his = <<'CODE';
my %hash;
map { $hash{$_}=1 } @a;
@a = keys %hash;
CODE
timethese ( 10000, { 'mine' => $mine,
'yours1' => $yours1,
'yours2' => $yours2,
'his' => $his
} );
__END__
C:\>perl test.pl
Benchmark: timing 10000 iterations of his, mine, yours1, yours2...
his: 17 wallclock secs (17.03 usr + 0.00 sys = 17.03 CPU) @ 58
+7.20/s (n=10000)
mine: 15 wallclock secs (15.05 usr + 0.00 sys = 15.05 CPU) @ 66
+4.45/s (n=10000)
yours1: 12 wallclock secs (11.76 usr + 0.00 sys = 11.76 CPU) @ 85
+0.34/s (n=10000)
yours2: 15 wallclock secs (14.78 usr + 0.00 sys = 14.78 CPU) @ 67
+6.59/s (n=10000)
C:\>
cheers
tachyon
s&&rsenoyhcatreve&&&s&n.+t&"$'$`$\"$\&"&ee&&y&srve&&d&&print
