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Minor performance tweaks to the pager.

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FossilOrigin-Name: 9ae1f9ce7ea6beaeddc3711080b3796e05acc4f8
This commit is contained in:
drh
2013-08-21 22:54:55 +00:00
parent cf5ff12105
commit 9d1ab0794e
3 changed files with 16 additions and 18 deletions
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12
manifest
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@@ -1,5 +1,5 @@
C Refactor\sthe\ssqlite3_randomness()\simplementation\sfor\simproved\sperformance. C Minor\sperformance\stweaks\sto\sthe\spager.
D 2013-08-21T22:09:25.294 D 2013-08-21T22:54:55.506
F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
F Makefile.in 5e41da95d92656a5004b03d3576e8b226858a28e F Makefile.in 5e41da95d92656a5004b03d3576e8b226858a28e
F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -204,7 +204,7 @@ F src/os.h 4a46270a64e9193af4a0aaa3bc2c66dc07c29b3f
F src/os_common.h 92815ed65f805560b66166e3583470ff94478f04 F src/os_common.h 92815ed65f805560b66166e3583470ff94478f04
F src/os_unix.c 9eafa5458cf2ff684ddccff82c9bb113c7cad847 F src/os_unix.c 9eafa5458cf2ff684ddccff82c9bb113c7cad847
F src/os_win.c 1d84f2079d9b91f91a4b5dbfa5e08f1b1a0ed0ff F src/os_win.c 1d84f2079d9b91f91a4b5dbfa5e08f1b1a0ed0ff
F src/pager.c 7c999137cb940133f7fc7609ccfa66f17eec4ab4 F src/pager.c 7e9130d5fad290aa6d6cf016852bde9ce0a06ea5
F src/pager.h 66e42d6942a445d4c25651733ab2079dbebc7ca9 F src/pager.h 66e42d6942a445d4c25651733ab2079dbebc7ca9
F src/parse.y 27c6b4138497d6f8360ba7847da6ed48033f957f F src/parse.y 27c6b4138497d6f8360ba7847da6ed48033f957f
F src/pcache.c f8043b433a57aba85384a531e3937a804432a346 F src/pcache.c f8043b433a57aba85384a531e3937a804432a346
@@ -1105,7 +1105,7 @@ F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
F tool/warnings.sh fbc018d67fd7395f440c28f33ef0f94420226381 F tool/warnings.sh fbc018d67fd7395f440c28f33ef0f94420226381
F tool/wherecosttest.c f407dc4c79786982a475261866a161cd007947ae F tool/wherecosttest.c f407dc4c79786982a475261866a161cd007947ae
F tool/win/sqlite.vsix 97894c2790eda7b5bce3cc79cb2a8ec2fde9b3ac F tool/win/sqlite.vsix 97894c2790eda7b5bce3cc79cb2a8ec2fde9b3ac
P 700dbbea8647e0fdaee6d0aba3d3dd8ebfbac04a P 4144dffb57b5ed791d7a6d2f26fab5e7dc77fbd1
R bace2fbe40d117379ef5fcee60c09ed4 R b15f43d0f820a86b48ec589e9a604865
U drh U drh
Z a22b19ec66f802a5577e622202a99c6b Z cdb48d46f0e84ecc9bf7ab245ef06a01

2
manifest.uuid
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@@ -1 +1 @@
4144dffb57b5ed791d7a6d2f26fab5e7dc77fbd1 9ae1f9ce7ea6beaeddc3711080b3796e05acc4f8

20
src/pager.c
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@@ -1022,13 +1022,17 @@ static char *print_pager_state(Pager *p){
** PagerSavepoint.pInSavepoint. ** PagerSavepoint.pInSavepoint.
*/ */
static int subjRequiresPage(PgHdr *pPg){ static int subjRequiresPage(PgHdr *pPg){
Pgno pgno = pPg->pgno;
Pager *pPager = pPg->pPager; Pager *pPager = pPg->pPager;
PagerSavepoint *p;
Pgno pgno;
int i; int i;
for(i=0; i<pPager->nSavepoint; i++){ if( pPager->nSavepoint ){
PagerSavepoint *p = &pPager->aSavepoint[i]; pgno = pPg->pgno;
if( p->nOrig>=pgno && 0==sqlite3BitvecTest(p->pInSavepoint, pgno) ){ for(i=0; i<pPager->nSavepoint; i++){
return 1; p = &pPager->aSavepoint[i];
if( p->nOrig>=pgno && 0==sqlite3BitvecTest(p->pInSavepoint, pgno) ){
return 1;
}
} }
} }
return 0; return 0;
@@ -2874,12 +2878,6 @@ static int readDbPage(PgHdr *pPg, u32 iFrame){
assert( pPager->eState>=PAGER_READER && !MEMDB ); assert( pPager->eState>=PAGER_READER && !MEMDB );
assert( isOpen(pPager->fd) ); assert( isOpen(pPager->fd) );
if( NEVER(!isOpen(pPager->fd)) ){
assert( pPager->tempFile );
memset(pPg->pData, 0, pPager->pageSize);
return SQLITE_OK;
}
#ifndef SQLITE_OMIT_WAL #ifndef SQLITE_OMIT_WAL
if( iFrame ){ if( iFrame ){
/* Try to pull the page from the write-ahead log. */ /* Try to pull the page from the write-ahead log. */