* gc.c (rb_gc_register_mark_object): change data structure.
  From single array, to array of arrays. Each array only has 1024
  entries.
* vm.c (Init_vm_objects): change default capa from 1 to 128.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46714 b2dd03c8-39d4-4d8f-98ff-823fe69b080e