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Reduce memory consumption of property names.

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Property names were always required a string reference which consumed
a large amount of memory for arrays. This patch reduces this consumption
by directly storing the value part of certain strings.

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
This commit is contained in:
Zoltan Herczeg
2016-11-25 05:44:57 -08:00
parent abaf4c8af8
commit 6d67b8dff9
18 changed files with 595 additions and 393 deletions
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jerry-core/ecma/base/ecma-globals.h
+29 -7
View File
@@ -329,6 +329,16 @@ typedef enum
*/
#define ECMA_PROPERTY_FIXED 0
/**
* Shift for property name part.
*/
#define ECMA_PROPERTY_NAME_TYPE_SHIFT (ECMA_PROPERTY_FLAG_SHIFT + 4)
/**
* Property name is a generic string.
*/
#define ECMA_PROPERTY_NAME_TYPE_STRING 3
/**
* Abstract property representation.
*
@@ -411,6 +421,12 @@ typedef struct
#define ECMA_PROPERTY_GET_TYPE(property) \
((ecma_property_types_t) ((property) & ECMA_PROPERTY_TYPE_MASK))
/**
* Get property name type.
*/
#define ECMA_PROPERTY_GET_NAME_TYPE(property) \
((property) >> ECMA_PROPERTY_NAME_TYPE_SHIFT)
/**
* Returns true if the property pointer is a property pair.
*/
@@ -418,6 +434,12 @@ typedef struct
(ECMA_PROPERTY_GET_TYPE ((property_header_p)->types[0]) != ECMA_PROPERTY_TYPE_VIRTUAL \
&& (property_header_p)->types[0] != ECMA_PROPERTY_TYPE_HASHMAP)
/**
* Returns true if the property is named property.
*/
#define ECMA_PROPERTY_IS_NAMED_PROPERTY(property) \
(ECMA_PROPERTY_GET_TYPE (property) != ECMA_PROPERTY_TYPE_SPECIAL)
/**
* Returns the internal property type
*/
@@ -909,14 +931,14 @@ typedef struct
*/
typedef enum
{
ECMA_STRING_CONTAINER_HEAP_UTF8_STRING, /**< actual data is on the heap as an utf-8 (cesu8) string
* maximum size is 2^16. */
ECMA_STRING_CONTAINER_HEAP_LONG_UTF8_STRING, /**< actual data is on the heap as an utf-8 (cesu8) string
* maximum size is 2^32. */
ECMA_STRING_CONTAINER_UINT32_IN_DESC, /**< actual data is UInt32-represeneted Number
stored locally in the string's descriptor */
ECMA_STRING_CONTAINER_MAGIC_STRING, /**< the ecma-string is equal to one of ECMA magic strings */
ECMA_STRING_CONTAINER_MAGIC_STRING_EX, /**< the ecma-string is equal to one of external magic strings */
ECMA_STRING_CONTAINER_HEAP_UTF8_STRING, /**< actual data is on the heap as an utf-8 (cesu8) string
* maximum size is 2^16. */
ECMA_STRING_CONTAINER_HEAP_LONG_UTF8_STRING, /**< actual data is on the heap as an utf-8 (cesu8) string
* maximum size is 2^32. */
ECMA_STRING_LITERAL_NUMBER, /**< a literal number which is used solely by the literal storage
* so no string processing function supports this type except
@@ -985,10 +1007,10 @@ typedef struct
lit_utf8_size_t long_utf8_string_size; /**< size of this long utf-8 string in bytes */
uint32_t uint32_number; /**< uint32-represented number placed locally in the descriptor */
lit_magic_string_id_t magic_string_id; /**< identifier of a magic string */
lit_magic_string_ex_id_t magic_string_ex_id; /**< identifier of an external magic string */
uint32_t magic_string_id; /**< identifier of a magic string (lit_magic_string_id_t) */
uint32_t magic_string_ex_id; /**< identifier of an external magic string (lit_magic_string_ex_id_t) */
ecma_value_t lit_number; /**< literal number (note: not a regular string type) */
uint32_t common_field; /**< for zeroing and comparison in some cases */
uint32_t common_uint32_field; /**< for zeroing and comparison in some cases */
} u;
} ecma_string_t;