Any idea why the following code falls back to slow standard Perl
implementation of BigInt module instead of highspeed GMP being used ?
(no warnings, GMP module _is_ installed)
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use Math::BigInt lib => 'GMP';
my $fac = Math::BigInt->new('4000');
print $fac->bfac(),"\n";
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time real ~ 4 secs !!
Equivalent code with the explicit use of GMP:
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use Math::GMP;
my $fac = Math::GMP->new('4000');
print $fac->bfac(),"\n";
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time real ~ 0.08 secs !!
