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Reorder the elements of the Mem object for a small size reduction and

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performance improvement.

FossilOrigin-Name: 0be3019ed794c10de67dfd645ceea7d45815bc4b
This commit is contained in:
drh
2014-09-16 14:16:31 +00:00
parent 7f4b19f170
commit 035e563bf6
7 changed files with 37 additions and 22 deletions
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13
src/vdbeInt.h
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@@ -161,9 +161,6 @@ struct VdbeFrame {
** integer etc.) of the same value.
*/
struct Mem {
sqlite3 *db; /* The associated database connection */
char *z; /* String or BLOB value */
double r; /* Real value */
union {
i64 i; /* Integer value used when MEM_Int is set in flags */
int nZero; /* Used when bit MEM_Zero is set in flags */
@@ -171,15 +168,19 @@ struct Mem {
RowSet *pRowSet; /* Used only when flags==MEM_RowSet */
VdbeFrame *pFrame; /* Used when flags==MEM_Frame */
} u;
int n; /* Number of characters in string value, excluding '\0' */
u16 flags; /* Some combination of MEM_Null, MEM_Str, MEM_Dyn, etc. */
u8 enc; /* SQLITE_UTF8, SQLITE_UTF16BE, SQLITE_UTF16LE */
int n; /* Number of characters in string value, excluding '\0' */
double r; /* Real value */
char *z; /* String or BLOB value */
char *zMalloc; /* Dynamic buffer allocated by sqlite3_malloc() */
/* ShallowCopy only needs to copy the information above */
sqlite3 *db; /* The associated database connection */
void (*xDel)(void*);/* If not null, call this function to delete Mem.z */
#ifdef SQLITE_DEBUG
Mem *pScopyFrom; /* This Mem is a shallow copy of pScopyFrom */
void *pFiller; /* So that sizeof(Mem) is a multiple of 8 */
#endif
void (*xDel)(void *); /* If not null, call this function to delete Mem.z */
char *zMalloc; /* Dynamic buffer allocated by sqlite3_malloc() */
};
/* One or more of the following flags are set to indicate the validOK