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Overview
Comment:Avoid unnecessary calls to object destructors for a small performance gain.
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SHA1: aec94b6ee68fe50e2cc14388281e2ef531e21d68
User & Date: drh 2016-04-12 00:16:54.551
Context
2016-04-12
00:26
Performance optimization the Vdbe allocator. (check-in: e2c4995bf1 user: drh tags: trunk)
00:16
Avoid unnecessary calls to object destructors for a small performance gain. (check-in: aec94b6ee6 user: drh tags: trunk)
00:00
Performance improvements in sqlite3WhereExprUsage(). (check-in: fdf752394b user: drh tags: trunk)
Changes
Side-by-Side Diff Ignore Whitespace Patch
Changes to src/select.c.
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    sqlite3SrcListDelete(db, p->pSrc);
    sqlite3ExprDelete(db, p->pWhere);
    sqlite3ExprListDelete(db, p->pGroupBy);
    sqlite3ExprDelete(db, p->pHaving);
    sqlite3ExprListDelete(db, p->pOrderBy);
    sqlite3ExprDelete(db, p->pLimit);
    sqlite3ExprDelete(db, p->pOffset);
    sqlite3WithDelete(db, p->pWith);
    if( p->pWith ) sqlite3WithDelete(db, p->pWith);
    if( bFree ) sqlite3DbFree(db, p);
    p = pPrior;
    bFree = 1;
  }
}

/*
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#endif


/*
** Delete the given Select structure and all of its substructures.
*/
void sqlite3SelectDelete(sqlite3 *db, Select *p){
  clearSelect(db, p, 1);
  if( p ) clearSelect(db, p, 1);
}

/*
** Return a pointer to the right-most SELECT statement in a compound.
*/
static Select *findRightmost(Select *p){
  while( p->pNext ) p = p->pNext;
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Changes to src/tokenize.c.
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    /* If the pParse->declareVtab flag is set, do not delete any table 
    ** structure built up in pParse->pNewTable. The calling code (see vtab.c)
    ** will take responsibility for freeing the Table structure.
    */
    sqlite3DeleteTable(db, pParse->pNewTable);
  }

  sqlite3WithDelete(db, pParse->pWithToFree);
  if( pParse->pWithToFree ) sqlite3WithDelete(db, pParse->pWithToFree);
  sqlite3DeleteTrigger(db, pParse->pNewTrigger);
  for(i=pParse->nzVar-1; i>=0; i--) sqlite3DbFree(db, pParse->azVar[i]);
  sqlite3DbFree(db, pParse->azVar);
  while( pParse->pAinc ){
    AutoincInfo *p = pParse->pAinc;
    pParse->pAinc = p->pNext;
    sqlite3DbFree(db, p);
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