Apologies if this is not the correct section to post. I have a question on the performance impact of creating temporary variables in Perl. Is there much difference between say 

sub diag {
my $x = shift @_;
my $y = shift @_;

my $x_sq = $x * $x;
my $y_sq = $y * $y;
my $prod = $x_sq + $y_sq;
my $result = sqrt($prod);
return $result;
}

[download]
vs 
sub diag {
return sqrt( $_[0] * $_[0] + $_[1] * $_[1]);
}

[download]

Thanks in advance (I guess I'm asking the reasoning behind it, and whether it should have much of an impact if we were repeating similar a lot of times, not to just measure it)

UPDATE: Thanks to all who replied. Sorry I had a typo. The operations were of course supposed to be the same! I didn't need a solution for a specific problem, it was just a theory question so I just did a simple formula as an example. i.e pythagerous

In reply to Very basic question on performance by morrin

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