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Minor performance optimization and size reduction to the accessPayload()

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routine in btree.c.

FossilOrigin-Name: 264e5c10d7144910b3223b64546567fa20e4bc65
This commit is contained in:
drh
2017-01-20 20:43:14 +00:00
parent dfd0de82f1
commit cd64553015
3 changed files with 16 additions and 15 deletions
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15
src/btree.c
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@@ -4523,16 +4523,14 @@ static int accessPayload(
pCur->aOverflow, nOvfl*2*sizeof(Pgno)
);
if( aNew==0 ){
rc = SQLITE_NOMEM_BKPT;
return SQLITE_NOMEM_BKPT;
}else{
pCur->nOvflAlloc = nOvfl*2;
pCur->aOverflow = aNew;
}
}
if( rc==SQLITE_OK ){
memset(pCur->aOverflow, 0, nOvfl*sizeof(Pgno));
pCur->curFlags |= BTCF_ValidOvfl;
}
memset(pCur->aOverflow, 0, nOvfl*sizeof(Pgno));
pCur->curFlags |= BTCF_ValidOvfl;
}
/* If the overflow page-list cache has been allocated and the
@@ -4547,8 +4545,8 @@ static int accessPayload(
offset = (offset%ovflSize);
}
for( ; rc==SQLITE_OK && amt>0 && nextPage; iIdx++){
assert( rc==SQLITE_OK && amt>0 );
while( nextPage ){
/* If required, populate the overflow page-list cache. */
if( (pCur->curFlags & BTCF_ValidOvfl)!=0 ){
assert( pCur->aOverflow[iIdx]==0
@@ -4637,6 +4635,9 @@ static int accessPayload(
amt -= a;
pBuf += a;
}
if( amt==0 ) break;
if( rc ) break;
iIdx++;
}
}