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Improve the construction of "length" built-in strings.

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The "length" property name is the most frequently used built-in string
and also frequently created by various hot-paths. New functions are
added to improve the speed of the "length" string creation.

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
This commit is contained in:
Zoltan Herczeg
2016-07-13 04:50:47 -07:00
parent b4bba2ef70
commit 6f1ce8d6bb
17 changed files with 131 additions and 84 deletions
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jerry-core/ecma/operations/ecma-function-object.c
+2 -8
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@@ -255,7 +255,7 @@ ecma_op_function_list_lazy_property_names (bool separate_enumerable, /**< true -
ecma_string_t *name_p;
/* 'length' property is non-enumerable (ECMA-262 v5, 13.2.5) */
name_p = ecma_get_magic_string (LIT_MAGIC_STRING_LENGTH);
name_p = ecma_new_ecma_length_string ();
ecma_append_to_values_collection (for_non_enumerable_p, ecma_make_string_value (name_p), true);
ecma_deref_ecma_string (name_p);
@@ -282,13 +282,7 @@ ecma_op_function_try_lazy_instantiate_property (ecma_object_t *obj_p, /**< the f
{
JERRY_ASSERT (!ecma_get_object_is_builtin (obj_p));
ecma_string_t *magic_string_length_p = ecma_get_magic_string (LIT_MAGIC_STRING_LENGTH);
bool is_length_property = ecma_compare_ecma_strings (magic_string_length_p, property_name_p);
ecma_deref_ecma_string (magic_string_length_p);
if (is_length_property)
if (ecma_string_is_length (property_name_p))
{
/* ECMA-262 v5, 13.2, 14-15 */
ecma_extended_object_t *ext_func_p = (ecma_extended_object_t *) obj_p;