Re: [Boost-users] cyl_bessel_j performance

Thanks for your reply. Yes, fortunately my charges were completely unfounded. I was confused by gcc behaviour. When I compile with explicit -O2 the timing is roughly same.

Whew :-)

So, if I may, yet another question. I suppose math::tr1 bessels use math implementation, aren't they?

Yes, it's they just use slightly different policies from the default to conform to C99's error handling requirements (ie no C++ exceptions get thrown). HTH, John.