iseq.c: Use an embedded set table in rb_estimate_iv_count

Author: byroot

iseq.c

@@ -2987,22 +2987,23 @@ rb_iseq_disasm(const rb_iseq_t *iseq)
 attr_index_t
 rb_estimate_iv_count(VALUE klass, const rb_iseq_t * initialize_iseq)
 {
-    struct rb_id_table * iv_names = rb_id_table_create(0);
+    set_table iv_names = { 0 };
+    set_init_embedded_numtable_with_size(&iv_names, 0);
 
     for (unsigned int i = 0; i < ISEQ_BODY(initialize_iseq)->ivc_size; i++) {
         IVC cache = (IVC)&ISEQ_BODY(initialize_iseq)->is_entries[i];
 
         if (cache->iv_set_name) {
-            rb_id_table_insert(iv_names, cache->iv_set_name, Qtrue);
+            set_insert(&iv_names, cache->iv_set_name);
         }
     }
 
-    attr_index_t count = (attr_index_t)rb_id_table_size(iv_names);
+    attr_index_t count = (attr_index_t)iv_names.num_entries;
 
     VALUE superclass = rb_class_superclass(klass);
     count += RCLASS_MAX_IV_COUNT(superclass);
 
-    rb_id_table_free(iv_names);
+    set_free_embedded_table(&iv_names);
 
     return count;
 }