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Overview
| Comment: | Change SQLITE_DEFAULT_PCACHE_INITSZ from 100 to 20, which is experimentally determined to be slightly faster. |
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| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
12d9493cb29307aec65ceccc68e802e4 |
| User & Date: | drh 2017-01-02 18:40:03 |
Context
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2017-01-02
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| 19:02 | Provide the SQLITE_DEFAULT_LOOKASIDE compile-time option and make it's default value be 1200,100 (raised from 512,125 in the latest release). (check-in: 584da48f user: drh tags: trunk) | |
| 18:40 | Change SQLITE_DEFAULT_PCACHE_INITSZ from 100 to 20, which is experimentally determined to be slightly faster. (check-in: 12d9493c user: drh tags: trunk) | |
| 18:19 | Avoid unnecessary calls to sqlite3BtreeEnterAll() and sqlite3BtreeLeaveAll() when no btree is using shared-cache. (check-in: cfb31582 user: drh tags: trunk) | |
Changes
Changes to src/sqliteInt.h.
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#endif
/*
** The default initial allocation for the pagecache when using separate
** pagecaches for each database connection. A positive number is the
** number of pages. A negative number N translations means that a buffer
** of -1024*N bytes is allocated and used for as many pages as it will hold.
*/
#ifndef SQLITE_DEFAULT_PCACHE_INITSZ
# define SQLITE_DEFAULT_PCACHE_INITSZ 100
#endif
/*
** GCC does not define the offsetof() macro so we'll have to do it
** ourselves.
*/
#ifndef offsetof
|
> > > | |
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#endif /* ** The default initial allocation for the pagecache when using separate ** pagecaches for each database connection. A positive number is the ** number of pages. A negative number N translations means that a buffer ** of -1024*N bytes is allocated and used for as many pages as it will hold. ** ** The default value of "20" was choosen to minimize the run-time of the ** speedtest1 test program with options: --shrink-memory --reprepare */ #ifndef SQLITE_DEFAULT_PCACHE_INITSZ # define SQLITE_DEFAULT_PCACHE_INITSZ 20 #endif /* ** GCC does not define the offsetof() macro so we'll have to do it ** ourselves. */ #ifndef offsetof |