Index $LOADED_FEATURES so that require isn't so slow

* load.c (rb_feature_p, rb_provide_feature): index $LOADED_FEATURES
  so that require isn't so slow.

* load.c (rb_provide_feature, get_loaded_features_index): ensure
  that $LOADED_FEATURES entries are frozen strings.  The user
  must mutate $LOADED_FEATURES itself rather than its individual
  entries.

* load.c (reset_loaded_features_snapshot): add a new function to reset
  vm->loaded_features_snapshot.

* load.c (get_loaded_features_index_raw): add a new function to get
  the loaded-features index.

* load.c (features_index_add_single): add a new function to add to the
  loaded-features index a single feature.

* load.c (features_index_add): add a new function to add to the
  loaded-features index all the required entries for `feature`.

* vm_core.h (rb_vm_struct): add fields.

* vm.c (rb_vm_mark): mark new fields.

* include/ruby/intern.h (rb_hash_clear): declare function.

* hash.c (rb_hash_clear): make function non-static.
  Patch by Greg Price.
  [ruby-core:47970] [Bug #7158]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37480 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 2 insertions, 0 deletions

diff --git a/vm.c b/vm.c
index 24c9a41147..90ce21d7fc 100644
--- a/vm.c
+++ b/vm.c
@@ -1513,6 +1513,8 @@ rb_vm_mark(void *ptr)
 	RUBY_MARK_UNLESS_NULL(vm->mark_object_ary);
 	RUBY_MARK_UNLESS_NULL(vm->load_path);
 	RUBY_MARK_UNLESS_NULL(vm->loaded_features);
+	RUBY_MARK_UNLESS_NULL(vm->loaded_features_snapshot);
+	RUBY_MARK_UNLESS_NULL(vm->loaded_features_index);
 	RUBY_MARK_UNLESS_NULL(vm->top_self);
 	RUBY_MARK_UNLESS_NULL(vm->coverages);
 	rb_gc_mark_locations(vm->special_exceptions, vm->special_exceptions + ruby_special_error_count);