Could it be that the hint that vr is looking for is simply to "define PERL_NO_GET_CONTEXT" ?

"Simply"!? No, it isn't simple :-) Not for me. And yes, with this define, a no-op stub performs equally fast both in Linux and threaded Win32, and time for test in OP is 3.7 sec, while it was ~5 and ~11, respectively. (So, BrowserUk, it looks like this stub wasn't optimized away.) Thank you for link and explanation, now at least I have some idea what's going on. The Hash::Util has this magic incantation as first line of its XS, while Array::RefElem hasn't anywhere, so it explains their different speed, too. My real C code calls SvPV and others, with this define it stops working as explained in link you provided, I'll have to solve this, but, these are details to work out.

In reply to Re^7: Inline::C on Windows: how to improve performance of compiled code? by vr
in thread Inline::C on Windows: how to improve performance of compiled code? by vr

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