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Overview
Comment: | The zeroPage() routine in btree.c need not actually zero the whole page, just the header. (CVS 5434) |
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Downloads: | Tarball | ZIP archive |
Timelines: | family | ancestors | descendants | both | trunk |
Files: | files | file ages | folders |
SHA1: |
c69633ec6977becfbd0a72854473b7f4 |
User & Date: | drh 2008-07-18 03:32:51.000 |
Context
2008-07-18
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05:36 | Init zFullCp to prevent crashes in case DosQueryPathInfo() fails. (CVS 5435) (check-in: 70685b2ae8 user: pweilbacher tags: trunk) | |
03:32 | The zeroPage() routine in btree.c need not actually zero the whole page, just the header. (CVS 5434) (check-in: c69633ec69 user: drh tags: trunk) | |
02:44 | Omit the check for cell-pointer consistency in sqlite3BtreeInitPage() for a 2.5% performance gain. (CVS 5433) (check-in: b88087e69d user: drh tags: trunk) | |
Changes
Changes to src/btree.c.
1 2 3 4 5 6 7 8 9 10 11 | /* ** 2004 April 6 ** ** The author disclaims copyright to this source code. In place of ** a legal notice, here is a blessing: ** ** May you do good and not evil. ** May you find forgiveness for yourself and forgive others. ** May you share freely, never taking more than you give. ** ************************************************************************* | | | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 | /* ** 2004 April 6 ** ** The author disclaims copyright to this source code. In place of ** a legal notice, here is a blessing: ** ** May you do good and not evil. ** May you find forgiveness for yourself and forgive others. ** May you share freely, never taking more than you give. ** ************************************************************************* ** $Id: btree.c,v 1.487 2008/07/18 03:32:51 drh Exp $ ** ** This file implements a external (disk-based) database using BTrees. ** See the header comment on "btreeInt.h" for additional information. ** Including a description of file format and an overview of operation. */ #include "btreeInt.h" |
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1025 1026 1027 1028 1029 1030 1031 | int first; assert( sqlite3PagerPagenumber(pPage->pDbPage)==pPage->pgno ); assert( sqlite3PagerGetExtra(pPage->pDbPage) == (void*)pPage ); assert( sqlite3PagerGetData(pPage->pDbPage) == data ); assert( sqlite3PagerIswriteable(pPage->pDbPage) ); assert( sqlite3_mutex_held(pBt->mutex) ); | | | 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 | int first; assert( sqlite3PagerPagenumber(pPage->pDbPage)==pPage->pgno ); assert( sqlite3PagerGetExtra(pPage->pDbPage) == (void*)pPage ); assert( sqlite3PagerGetData(pPage->pDbPage) == data ); assert( sqlite3PagerIswriteable(pPage->pDbPage) ); assert( sqlite3_mutex_held(pBt->mutex) ); /*memset(&data[hdr], 0, pBt->usableSize - hdr);*/ data[hdr] = flags; first = hdr + 8 + 4*((flags&PTF_LEAF)==0); memset(&data[hdr+1], 0, 4); data[hdr+7] = 0; put2byte(&data[hdr+5], pBt->usableSize); pPage->nFree = pBt->usableSize - first; decodeFlags(pPage, flags); |
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