database/sqlite
1
0
Fork 0
mirror of https://github.com/sqlite/sqlite.git synced 2025-11-12 13:01:09 +03:00
Code Activity

Work toward reducing the incremental size of an ExprList object to 24-byte

Browse Source 
per entry, from 32-bytes (on a 64-bit machine).  This helps the new
mini-lookaside allocator to run better by avoiding excessive reallocs.
The current change mostly works, but still has a few loose ends to tie up.
This check-in is merely a snapshot to save my work.

FossilOrigin-Name: fdda76cfb01bf2b19522ac4558b443634d28a69b0828677c42682b645eae1f3b
This commit is contained in:
drh
2019-12-12 22:11:33 +00:00
parent c947d6a4dc
commit cbb9da337e
6 changed files with 54 additions and 39 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
src/expr.c
View File

@@ -1437,11 +1437,10 @@ ExprList *sqlite3ExprListDup(sqlite3 *db, ExprList *p, int flags){
}
}
pItem->zEName = sqlite3DbStrDup(db, pOldItem->zEName);
pItem->zSpan = sqlite3DbStrDup(db, pOldItem->zSpan);
pItem->sortFlags = pOldItem->sortFlags;
pItem->eEName = pOldItem->eEName;
pItem->done = 0;
pItem->bNulls = pOldItem->bNulls;
pItem->bSpanIsTab = pOldItem->bSpanIsTab;
pItem->bSorterRef = pOldItem->bSorterRef;
pItem->u = pOldItem->u;
}
@@ -1773,8 +1772,10 @@ void sqlite3ExprListSetSpan(
if( pList ){
struct ExprList_item *pItem = &pList->a[pList->nExpr-1];
assert( pList->nExpr>0 );
sqlite3DbFree(db, pItem->zSpan);
pItem->zSpan = sqlite3DbSpanDup(db, zStart, zEnd);
if( pItem->zEName==0 ){
pItem->zEName = sqlite3DbSpanDup(db, zStart, zEnd);
pItem->eEName = ENAME_SPAN;
}
}
}
@@ -1805,7 +1806,6 @@ static SQLITE_NOINLINE void exprListDeleteNN(sqlite3 *db, ExprList *pList){
do{
sqlite3ExprDelete(db, pItem->pExpr);
sqlite3DbFree(db, pItem->zEName);
sqlite3DbFree(db, pItem->zSpan);
pItem++;
}while( --i>0 );
sqlite3DbFreeNN(db, pList);