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Performance improvement: reduce the number of calls to ptrmapPageno() made by ptrmapPut() and ptrmapGet(). (CVS 5437)

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FossilOrigin-Name: d807fb271340901bbf3e06de23d91132422d1408
This commit is contained in:
danielk1977
2008-07-18 09:34:57 +00:00
parent d3c4bad7fe
commit 8c666b1666
4 changed files with 13 additions and 13 deletions
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6
src/btree.c
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@@ -9,7 +9,7 @@
** May you share freely, never taking more than you give.
**
*************************************************************************
** $Id: btree.c,v 1.487 2008/07/18 03:32:51 drh Exp $
** $Id: btree.c,v 1.488 2008/07/18 09:34:57 danielk1977 Exp $
**
** This file implements a external (disk-based) database using BTrees.
** See the header comment on "btreeInt.h" for additional information.
@@ -458,7 +458,7 @@ static int ptrmapPut(BtShared *pBt, Pgno key, u8 eType, Pgno parent){
if( rc!=SQLITE_OK ){
return rc;
}
offset = PTRMAP_PTROFFSET(pBt, key);
offset = PTRMAP_PTROFFSET(iPtrmap, key);
pPtrmap = (u8 *)sqlite3PagerGetData(pDbPage);
if( eType!=pPtrmap[offset] || get4byte(&pPtrmap[offset+1])!=parent ){
@@ -497,7 +497,7 @@ static int ptrmapGet(BtShared *pBt, Pgno key, u8 *pEType, Pgno *pPgno){
}
pPtrmap = (u8 *)sqlite3PagerGetData(pDbPage);
offset = PTRMAP_PTROFFSET(pBt, key);
offset = PTRMAP_PTROFFSET(iPtrmap, key);
assert( pEType!=0 );
*pEType = pPtrmap[offset];
if( pPgno ) *pPgno = get4byte(&pPtrmap[offset+1]);