At http://www.cygwin.com/ml/cygwin/2007-09/msg00194.html
Tatsuro Matsuoka wrote:
> The best solution, I think, the speed of sjlj-exceptions EH on the
> cygwin is as fast as that of other platforms.
>
In the case of octave, I believe that the main cause of slowdown is the
sjlj EH code generated in prologue of new()
Does a no-throw override of libary version of these functions help ?
Danny
#ifdef __USING_SJLJ_EXCEPTIONS__
#define NEW_THROW_SPEC throw()
#else
#define NEW_THROW_SPEC throw(std::bad_alloc)
#endif
#include ...
void *
operator new (std::size_t sz) NEW_THROW_SPEC
{
void *p;
/* malloc (0) is unpredictable; avoid it. */
if (sz == 0)
sz = 1;
p = (void *) malloc (sz);
while (p == 0)
{
new_handler handler = __new_handler;
if (! handler)
#ifdef __USING_SJLJ_EXCEPTIONS__
std::abort();
#else
throw bad_alloc();
#endif
handler ();
p = (void *) malloc (sz);
}
return p;
}
void *
operator new[] (std::size_t sz) NEW_THROW_SPEC
{
return ::operator new(sz);
}
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