boost::regex performance issue

Question

I am using boost::regex to find a delimiter in a string (in c++) and replace it with a different one if exist:

const boost::regex esc(delimiter);
const std::string rep = "\\\\" + delimiter;

dest += boost::regex_replace(str, esc, rep,
            boost::match_default | boost::format_sed);

But when using boost::regex I have a huge decrease in performance (about 50%).

Does anyone know why? Is this a know issue?

50% performance decrease compared to what? – mfontanini May 01 '12 at 13:42 — mfontanini, May 01 '12 at 13:42

score -1 · Answer 1 · answered May 01 '12 at 16:29

-1

We have, in recent times, rolled our own, state-machine based pattern matching routine, having figured out regex was slow. Does that help?

answered May 01 '12 at 16:29

dirkgently

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boost::regex performance issue

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