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Improve ecma_string_t descriptor (#3016)

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This patch introduces several changes conntect to ecma-strings:
 - Extend the size of the reference counter to 28 bytes from 13
 - Extend the size of the string hash to 32 bytes from 16 to use the extact FNV-1a hash
 - Introduce ECMA_STATIC_STRING_FLAG to reduce the number of string ref/derefs for static strings.
 - Introduce ECMA_STRING_CONTAINER_ASCII_STRING to store run-time allocated ASCII strings more efficiently
 - Remove ECMA_STRING_CONTAINER_LIT_NUMBER to half the storage size of the parsing time allocated floating point numbers
 - Rework the global number storage, to store only the floating point numbers
 - Optimize the lookup in the global number/string/symbol tables via reduce the number of NULL checks during decompressing the next element pointers
 - Reduce the code duplication in ecma_concat_ecma_strings and ecma_append_chars_to_string
 - Improve ecma_string_get_char with optional arguments to make it more reusable.

JerryScript-DCO-1.0-Signed-off-by: Robert Fancsik frobert@inf.u-szeged.hu
This commit is contained in:
Robert Fancsik
2019-08-30 15:16:27 +02:00
committed by GitHub
parent f0578b2c25
commit c6a4a86257
15 changed files with 799 additions and 618 deletions
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jerry-core/ecma/base/ecma-gc.c
+1 -1
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@@ -266,7 +266,7 @@ ecma_gc_mark_container_object (ecma_object_t *object_p) /**< object */
if (ECMA_STRING_GET_CONTAINER (prop_name_p) == ECMA_STRING_CONTAINER_MAP_KEY)
{
ecma_value_t key_arg = prop_name_p->u.value;
ecma_value_t key_arg = ((ecma_extended_string_t *) prop_name_p)->u.value;
if (ecma_is_value_object (key_arg))
{