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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/vm/vm.c
+3 -5
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@@ -1002,7 +1002,7 @@ vm_loop (vm_frame_ctx_t *frame_ctx_p) /**< frame context */
case VM_OC_APPEND_ARRAY:
{
ecma_object_t *array_obj_p;
ecma_string_t *length_str_p;
ecma_string_t length_str;
ecma_property_t *length_prop_p;
uint32_t length_num;
uint32_t values_length = *byte_code_p++;
@@ -1010,16 +1010,14 @@ vm_loop (vm_frame_ctx_t *frame_ctx_p) /**< frame context */
stack_top_p -= values_length;
array_obj_p = ecma_get_object_from_value (stack_top_p[-1]);
length_str_p = ecma_get_magic_string (LIT_MAGIC_STRING_LENGTH);
length_prop_p = ecma_get_named_property (array_obj_p, length_str_p);
ecma_init_ecma_length_string (&length_str);
length_prop_p = ecma_get_named_property (array_obj_p, &length_str);
JERRY_ASSERT (length_prop_p != NULL);
left_value = ecma_get_named_data_property_value (length_prop_p);
length_num = ecma_get_uint32_from_value (left_value);
ecma_deref_ecma_string (length_str_p);
for (uint32_t i = 0; i < values_length; i++)
{
if (!ecma_is_value_array_hole (stack_top_p[i]))