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Re^2: Print Number With Implied Decimal Point

by Eliya (Vicar)
on Apr 18, 2012 at 14:51 UTC ( #965724=note: print w/replies, xml ) Need Help??


in reply to Re: Print Number With Implied Decimal Point
in thread Print Number With Implied Decimal Point

substr will be faster though.

Yes, by several orders of magnitude...

use Benchmark qw(cmpthese); use Math::BigFloat; Math::BigFloat->precision(-2); my $number = "999999999999999999999900"; cmpthese -1, { substr => sub { my $num=$number; substr($num,-2,0) = '.'; }, BigFloat => sub { my $num=$number; Math::BigFloat->new($num)/100; +}, }; __END__ Rate BigFloat substr BigFloat 3794/s -- -100% substr 1668189/s 43874% --

And that doesn't even involve accessing or printing out the constructed BigFloat again.

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