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-rw-r--r--iseq.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/iseq.c b/iseq.c
index befa0364dc..b295469b59 100644
--- a/iseq.c
+++ b/iseq.c
@@ -484,6 +484,7 @@ iseq_load(VALUE self, VALUE data, VALUE parent, VALUE opt)
VALUE type, body, locals, args, exception;
st_data_t iseq_type;
+ static struct st_table *type_map_cache = 0;
struct st_table *type_map = 0;
rb_iseq_t *iseq;
rb_compile_option_t option;
@@ -524,7 +525,9 @@ iseq_load(VALUE self, VALUE data, VALUE parent, VALUE opt)
iseq->self = iseqval;
iseq->local_iseq = iseq;
+ type_map = type_map_cache;
if (type_map == 0) {
+ struct st_table *cached_map;
type_map = st_init_numtable();
st_insert(type_map, ID2SYM(rb_intern("top")), ISEQ_TYPE_TOP);
st_insert(type_map, ID2SYM(rb_intern("method")), ISEQ_TYPE_METHOD);
@@ -535,6 +538,11 @@ iseq_load(VALUE self, VALUE data, VALUE parent, VALUE opt)
st_insert(type_map, ID2SYM(rb_intern("eval")), ISEQ_TYPE_EVAL);
st_insert(type_map, ID2SYM(rb_intern("main")), ISEQ_TYPE_MAIN);
st_insert(type_map, ID2SYM(rb_intern("defined_guard")), ISEQ_TYPE_DEFINED_GUARD);
+ cached_map = ATOMIC_PTR_CAS(type_map_cache, (struct st_table *)0, type_map);
+ if (cached_map) {
+ st_free_table(type_map);
+ type_map = cached_map;
+ }
}
if (st_lookup(type_map, type, &iseq_type) == 0) {