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Optimize array reverse for fast-array cases. (#3231)

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Performace result:
Intel: 5m30s -> 0m3,9s
ARM: over 15m -> 1m14s

JerryScript-DCO-1.0-Signed-off-by: Adam Szilagyi aszilagy@inf.u-szeged.hu
This commit is contained in:
Szilagyi Adam 2019-10-30 16:44:29 +01:00 committed by Dániel Bátyai
parent d801fc70bb
commit 6639bbc580
1 changed files with 21 additions and 1 deletions
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22
jerry-core/ecma/builtin-objects/ecma-builtin-array-prototype.c
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@ -548,7 +548,27 @@ ecma_builtin_array_prototype_object_reverse (ecma_value_t this_arg, /**< this ar
/* 4. */
uint32_t middle = len / 2;
/* 5-6. */
if (ecma_op_object_is_fast_array (obj_p))
{
ecma_extended_object_t *ext_obj_p = (ecma_extended_object_t *) obj_p;
if (ext_obj_p->u.array.u.hole_count < ECMA_FAST_ARRAY_HOLE_ONE
&& len != 0
&& ecma_get_object_extensible (obj_p))
{
ecma_value_t *buffer_p = ECMA_GET_NON_NULL_POINTER (ecma_value_t, obj_p->u1.property_list_cp);
for (uint32_t i = 0; i < middle; i++)
{
ecma_value_t tmp = buffer_p[i];
buffer_p[i] = buffer_p[len - 1 - i];
buffer_p[len - 1 - i] = tmp;
}
return ecma_copy_value (this_arg);
}
}
for (uint32_t lower = 0; lower < middle; lower++)
{
ecma_value_t ret_value = ECMA_VALUE_ERROR;