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Shink RClass when it is known they can't be namespaced

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Even when namespaces are enabled, only a few core classes created
during init will eventually be namespaced.

For these it's OK to allocate a 320B slot to hold the extra namespace
stuff.

But for any class created post init, we know we'll never need the
namespace and we can fit in a 160B slot.
This commit is contained in:
Jean Boussier 2025-06-18 11:31:11 +01:00
parent ea4a53c595
commit 32ee3fab0a
2 changed files with 21 additions and 10 deletions
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8
class.c
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@ -394,7 +394,7 @@ class_classext_foreach_i(st_data_t key, st_data_t value, st_data_t arg)
void
rb_class_classext_foreach(VALUE klass, rb_class_classext_foreach_callback_func *func, void *arg)
{
st_table *tbl = RCLASS(klass)->ns_classext_tbl;
st_table *tbl = RCLASS_CLASSEXT_TBL(klass);
struct class_classext_foreach_arg foreach_arg;
if (tbl) {
foreach_arg.func = func;
@ -649,7 +649,11 @@ class_alloc(enum ruby_value_type type, VALUE klass)
rb_ns_subclasses_t *ns_subclasses;
rb_subclass_anchor_t *anchor;
const rb_namespace_t *ns = rb_definition_namespace();
size_t alloc_size = sizeof(struct RClass) + sizeof(rb_classext_t);
size_t alloc_size = sizeof(struct RClass_and_rb_classext_t);
if (!ruby_namespace_init_done) {
alloc_size = sizeof(struct RClass_namespaceable);
}
// class_alloc is supposed to return a new object that is not promoted yet.
// So, we need to avoid GC after NEWOBJ_OF.