database/sqlite
1
0
Fork 0
mirror of https://github.com/sqlite/sqlite.git synced 2025-08-05 15:55:57 +03:00
Code Activity

Make the walIndexPage() routine about 3x faster by factoring out the seldom

Browse Source 
used reallocation logic into a separate subroutine.

FossilOrigin-Name: e2b107141cd97bd4ab240748a9ce43fc2ec950ea74610697a4a7a3d7a6441e6b
This commit is contained in:
drh
2018-02-20 22:20:57 +00:00
parent 7436f1e491
commit 2e178d7321
3 changed files with 22 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
src/wal.c
View File

@@ -554,7 +554,11 @@ struct WalIterator {
** page and SQLITE_OK is returned. If an error (an OOM or VFS error) occurs,
** then an SQLite error code is returned and *ppPage is set to 0.
*/
static int walIndexPage(Wal *pWal, int iPage, volatile u32 **ppPage){
static SQLITE_NOINLINE int walIndexPageRealloc(
Wal *pWal, /* The WAL context */
int iPage, /* The page we seek */
volatile u32 **ppPage /* Write the page pointer here */
){
int rc = SQLITE_OK;
/* Enlarge the pWal->apWiData[] array if required */
@@ -596,6 +600,16 @@ static int walIndexPage(Wal *pWal, int iPage, volatile u32 **ppPage){
assert( iPage==0 || *ppPage || rc!=SQLITE_OK );
return rc;
}
static int walIndexPage(
Wal *pWal, /* The WAL context */
int iPage, /* The page we seek */
volatile u32 **ppPage /* Write the page pointer here */
){
if( pWal->nWiData<=iPage || (*ppPage = pWal->apWiData[iPage])==0 ){
return walIndexPageRealloc(pWal, iPage, ppPage);
}
return SQLITE_OK;
}
/*
** Return a pointer to the WalCkptInfo structure in the wal-index.