On Sun 19 Sep 2010 17:28, Julian Graham <jool...@gmail.com> writes: >> Is it possible to keep the current flat record layout, and change this >> check to be: >> >> (define (record-internal? obj) >> (and (struct? obj) >> (eq? (struct-vtable (struct-vtable obj)) >> record-type-vtable))) >> >> What kind of performance do you get there? > > I'm probably misunderstanding things, but this code doesn't work for > me -- I think there are some other modifications that'd be necessary. > I'm guessing you're proposing something along the lines of using > Vtable Vtables, as described in manual section 5.6.9.4?
No not really; just that record-types should be instances of record-type-vtable, which itself is a normal vtable (not a vtable-vtable). Will elaborate later, have to run out the door :) A -- http://wingolog.org/
