This is the next step in PMC/Buffer unification. - mark_used and buffer_lives are both substituted by: void pobject_lives(INTERP *, PObj *) - the mark vtable function is adjusted to above signature - the string_header and buffer_header pools are now only pointers to the real pools managed in sized_header_pools - this saves ~150 lines and increases bench_newp.pasm loops by ~10%
- ticket #19418 is included (ia64.s is in config/gen/platform) leo
