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  SvGrow($BigString, 100000) = InitialValueOfBigString();

=head1 DESCRIPTION

Trivial module implementing string storage preallocation using
techniques shared on perl5-porters mailing list November 4 and 5, 2009

=head1 EXPORT

the C<SvGROW> subroutine is exported. It takes two arguments,
the first the string to extend and the second the length.

=head1 SEE ALSO

L<perlguts>

L<Data::Peek> for a benchmarking of the alternatives

The author of this module is in favor of allowing C<length> to
be used as an lvalue to thinly invoke the SvGROW internals macro