04-18-2013
Why were you asked to rewrite in C++? Was any justification given? Or is it just a blind assumption that it will be better?
I am going to assume that the perl script is a complicated beast.
I would seriously advise
against a rewrite, except as a last resort. Complex code that works well is usually the result of a lot of testing and debugging. I would not cast it aside lightly.
I concur with Corona688 and elixir_sinari. Profile your current script and see where it spends most of its time. Then, have a look at those subroutines and see if they can be optimized in perl. Even if that's insufficient, a complete rewrite is still not your only alternative. The critical perl sections can be re-implemented in C and loaded by the perl interpreter like any other module:
perlxs.
One thing is certain: advice on whether to rewrite code from people who do not know what that code does isn't worth much. Perhaps not even the proverbial 2 cents.
Regards,
Alister
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LEARN ABOUT DEBIAN
html::rewriteattributes
HTML::RewriteAttributes(3pm) User Contributed Perl Documentation HTML::RewriteAttributes(3pm)
NAME
HTML::RewriteAttributes - concise attribute rewriting
SYNOPSIS
$html = HTML::RewriteAttributes->rewrite($html, sub {
my ($tag, $attr, $value) = @_;
# delete any attribute that mentions..
return if $value =~ /COBOL/i;
$value =~ s/rocks/rules/g;
return $value;
});
# writing some HTML email I see..
$html = HTML::RewriteAttributes::Resources->rewrite($html, sub {
my $uri = shift;
my $content = render_template($uri);
my $cid = generate_cid_from($content);
$mime->attach($cid => content);
return "cid:$cid";
});
# up for some HTML::ResolveLink?
$html = HTML::RewriteAttributes::Links->rewrite($html, "http://search.cpan.org");
# or perhaps HTML::LinkExtor?
HTML::RewriteAttributes::Links->rewrite($html, sub {
my ($tag, $attr, $value) = @_;
push @links, $value;
$value;
});
DESCRIPTION
"HTML::RewriteAttributes" is designed for simple yet powerful HTML attribute rewriting.
You simply specify a callback to run for each attribute and we do the rest for you.
This module is designed to be subclassable to make handling special cases eaiser. See the source for methods you can override.
METHODS
"new"
You don't need to call "new" explicitly - it's done in "rewrite". It takes no arguments.
"rewrite" HTML, callback -> HTML
This is the main interface of the module. You pass in some HTML and a callback, the callback is invoked potentially many times, and you get
back some similar HTML.
The callback receives as arguments the tag name, the attribute name, and the attribute value (though subclasses may override this --
HTML::RewriteAttributes::Resources does). Return "undef" to remove the attribute, or any other value to set the value of the attribute.
SEE ALSO
HTML::Parser, HTML::ResolveLink, Email::MIME::CreateHTML, HTML::LinkExtor
THANKS
Some code was inspired by, and tests borrowed from, Miyagawa's HTML::ResolveLink.
AUTHOR
Shawn M Moore, "<sartak@bestpractical.com>"
LICENSE
Copyright 2008-2010 Best Practical Solutions, LLC. HTML::RewriteAttributes is distributed under the same terms as Perl itself.
perl v5.10.1 2010-11-18 HTML::RewriteAttributes(3pm)