After a few websearches, it seems as if you can use: 
(void)(*CvXSUB(cv))(cv);

[download]
to skip the overhead of perl_call_sv() and call the internal C code directly. Supposedly, this is much faster. I've only barely touched perlguts, perlapi, anc perlcall stuff with C modules, so I'm unsure, but I hope it works for you. At least it might get you started.

    --jb

In reply to Re: calling XSUBs from other XSUBs? by JayBonci
in thread calling XSUBs from other XSUBs? by bmdhacks

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