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Reorder the fields in private structures in an effort to reduce alignment

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gaps and thus make the structures smaller, and to put frequently accessed
fields first.  Also update some obsolete comments.  Valgrind shows a very
slight performance improvement.

FossilOrigin-Name: 378a1d13af4a6f4cb2bfa65944b3b0d444b9f21c
This commit is contained in:
drh
2011-01-07 02:50:40 +00:00
parent b7787eef7a
commit 2e5de2f2b3
5 changed files with 54 additions and 78 deletions
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2
src/vdbeapi.c
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@@ -685,7 +685,7 @@ static Mem *columnMem(sqlite3_stmt *pStmt, int i){
#if defined(SQLITE_DEBUG) && defined(__GNUC__)
__attribute__((aligned(8)))
#endif
= {{0}, (double)0, 0, "", 0, MEM_Null, SQLITE_NULL, 0, 0, 0 };
= {0, "", (double)0, {0}, 0, MEM_Null, SQLITE_NULL, 0, 0, 0 };
if( pVm && ALWAYS(pVm->db) ){
sqlite3_mutex_enter(pVm->db->mutex);