On Jan 9, 2006, at 7:18 AM, Peter Dimov wrote:
Douglas Gregor wrote:
So, Peter, any chance of getting a slightly more optimized Boost.Bind that can fit boost::bind(&Test::func, &func, _1) into 12 bytes?
I can't think of an easy way to do that at the moment (compress all placeholders to not take up space).
Well, there's compressed_pair<F, compressed_pair<arg1_type, compressed_pair<arg2_type> > >...
Even if I did, bind(&X::f, &x, _1, true) would still overflow the 12 byte buffer. ;-)
Why? Does it need more than the 8-byte member pointer and 4-byte pointer?
One hack-ish solution would be to increase the buffer to 16, possibly even 32, and try the measurements again. This of course has obvious drawbacks for people that use only function<> without bind.
Much of my earlier whining about implementing the SBO in boost::function is that I've been trying to keep the overhead down. I think at it's current state with the 12-byte buffer, it's at the right balance point between execution time and space overhead (assuming we can trick bind into smashing those binders into 12 bytes <g>). Doug