This Day In History For 2018-04-01
1 Year Ago (more context)
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2017-04-01
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| 20:44 | Remove an unnecessary setting of the Mem.enc field for the output of the OP_Record opcode, for a performance improvement and size reduction. (check-in: e6e36b288f user: drh tags: trunk) | |
| 20:14 | Minor performance enhancements to the OP_Affinity opcode. (check-in: c45cd3b947 user: drh tags: trunk) | |
| 19:45 | Remove an unnecessary clearing of the Vdbe.iCurrentTime value. (check-in: fcd2acdd60 user: drh tags: trunk) | |
| 11:59 | Faster implementation for sqlite3VdbeIntValue() and sqlite3VdbeRealValue(). (check-in: 8698df60c2 user: drh tags: trunk) | |
| 11:40 | Remove unused fields from the BtCursor object. (check-in: 1c0d82e078 user: drh tags: trunk) | |
| 00:20 | Save a 78 bytes of code space and a million CPU cycles in speedtest1 by storing the cell index for the leaf page in the BtCursor object in its own field (BtCursor.ix), rather than as an entry in the BtCursor.aiIdx array. (check-in: 2452f0617d user: drh tags: trunk) | |
2 Years Ago (more context)
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2016-04-01
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| 17:54 | Preupdate hook documentation fixes. No changes to code. (check-in: 59814f35d1 user: drh tags: trunk) | |
| 12:35 | When reading an sqlite_stat1 table with missing entries for some indexes, set the default for the missing indexes after all other indexes are set so that the default values are more in line with indexes that are actually in the stat1 table. (check-in: a62340dc05 user: drh tags: trunk) | |
3 Years Ago (more context)
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2015-04-01
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| 18:22 | Merge latest trunk changes with this branch. (check-in: 4621b2eef8 user: dan tags: sorter-opt) | |
| 18:20 | When vacuuming an index that uses no collations other than BINARY, assume that the order of index entries will not be changed by the VACUUM. (check-in: e403460b96 user: dan tags: sorter-opt) | |
| 16:39 | Merge recent enhancements from trunk. (check-in: aea439bdc6 user: drh tags: sessions) | |
| 16:18 | Reduce the CPU used by CREATE INDEX statements by taking better advantage of the fact that keys are inserted in sorted order. (check-in: 592cdc5d72 user: dan tags: sorter-opt) | |
| 16:13 | Merge all recent trunk fixes and enhancements into the apple-osx branch. (check-in: 71b6f507f1 user: drh tags: apple-osx) | |
| 15:15 | • Edit [763d2bc74b560c86|763d2bc74b]: Move to branch mistake. Add propagating "hidden". (artifact: 7b2179a579 user: dan) | |
| 13:21 | Improved detection and suppression of endless loops in clearDatabasePage(). (check-in: 30011ad2f5 user: drh tags: trunk) | |
| 12:16 | • Edit [5c965a71b957fdb0|5c965a71b9]: Move to branch winTest. Edit check-in comment. (artifact: 2f0fef6af1 user: drh) | |
| 01:26 | The build is still broken. Multiple definitions of sqlite3OSTrace when compiled using separate source files. (check-in: 5c965a71b9 user: drh tags: winTest) | |
4 Years Ago (more context)
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2014-04-01
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| 18:41 | When sorting data for a CREATE INDEX statement in single-threaded mode, assume that keys are delivered to the sorter in primary key order. Also fix various comments that had fallen out of date. (check-in: 821d1ac450 user: dan tags: threads) | |
| 15:38 | Even if compile time option SQLITE_MAX_WORKER_THREADS is set to one or greater, set the default number of worker threads to zero. Distribute data more evenly between threads in sqlite3VdbeSorterWrite() to improve performance when sorting large amounts of data. Add new test file sort2.test. (check-in: 643c86a056 user: dan tags: threads) | |
| 10:19 | Fix a problem with OOM handling in the sorter code. (check-in: 59cd5229e2 user: dan tags: threads) | |
| 01:24 | Remove an unnecessary conditional, replacing it with an assert(). Improvements to comments. (Closed-Leaf check-in: 834bf1c367 user: drh tags: overflow-pgno-cache) | |
5 Years Ago (more context)
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2013-04-01
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| 22:42 | Remove a debugging printf() accidently left in the previous check-in. (check-in: 8198cdd8ac user: drh tags: experimental-mmap) | |
| 22:38 | Add the SQLITE_CONFIG_MMAP_LIMIT configuration option for overriding the SQLITE_DEFAULT_MMAP_LIMIT compile-time setting. Enhance "PRAGMA mmap_limit" so that without a specific database name, it sets the limit on all database files and changes the default for any future databases that might be added using ATTACH. (check-in: 78141d0a16 user: drh tags: experimental-mmap) | |
| 18:25 | Add a comment to xUnfetch on windows to say that the call to winUnmapfile() might be unnecessary. (check-in: e3c63c31a2 user: drh tags: experimental-mmap) | |
| 18:15 | In windows, round down the size of the memory mapped region to the next smaller multiple of the page size. (check-in: 0e44ed1bad user: drh tags: experimental-mmap) | |
| 17:58 | Merge accidental fork. (check-in: 5f4437c0e3 user: dan tags: experimental-mmap) | |
| 17:56 | Attempt to emulate mremap() on non-Linux systems by allocating a second mapping immediately following the first in virtual memory. (check-in: 4d67433db8 user: dan tags: experimental-mmap) | |
| 17:56 | Bug fix in the winMapfile() subroutine: Be sure to record the map object handle in the sqlite3_file object. (check-in: ee4d188e20 user: drh tags: experimental-mmap) | |
| 17:22 | Add xFetch and xUnfetch methods to the os_win.c VFS. (check-in: a1653a257d user: drh tags: experimental-mmap) | |
| 16:56 | Ensure that a checkpoint does not use an out-of-date mapping. (check-in: a1040f0397 user: dan tags: experimental-mmap) | |
| 14:35 | Fix a typo in a log message in wal.c. (check-in: 83fc48d165 user: dan tags: experimental-mmap) | |
| 14:29 | Fix a problem in btree.c that could cause a crash following an OOM. (check-in: b724aa5889 user: dan tags: experimental-mmap) | |
| 14:20 | Minor changes to unixMapfile() function. (Leaf check-in: 80c63443c4 user: dan tags: two-mappings) | |
10 Years Ago (more context)
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2008-04-01
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| 18:04 | Avoid factoring single-instruction constants that end up getting replaced by an SCopy instruction. (CVS 4952) (check-in: e84ff57b62 user: drh tags: trunk) | |
| 15:06 | Add the testcase() macro. Additional CSE test coverage. (CVS 4951) (check-in: 492490f9c8 user: drh tags: trunk) | |
| 12:24 | Fix a problem with CASTs and the new CSE mechanism. (CVS 4950) (check-in: e25939fb25 user: drh tags: trunk) | |
| 05:07 | Fix the CSE mechanism so that it takes into account column affinity changes that might be imposed by comparison operators. (CVS 4949) (check-in: 91cc646e2b user: drh tags: trunk) | |
| 03:27 | More test cases and bug fixes with CSE. (CVS 4948) (check-in: 7e8156129d user: drh tags: trunk) | |
| 02:45 | Add a configure option for using gcov (makes things easier for versions of GCC that fail to build otherwise) (CVS 4947) (check-in: 7d1e797162 user: mlcreech tags: trunk) | |
| 01:42 | Initial test cases and bug fixes in the CSE logic. (CVS 4946) (check-in: e5aff09ac6 user: drh tags: trunk) | |
| 00:36 | Break up the implementation of OP_Move, OP_Copy, and OP_SCopy to reduce the number of branch instructions. (CVS 4945) (check-in: 53e533d3a7 user: drh tags: trunk) | |
15 Years Ago (more context)
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2003-04-01
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| 21:16 | Add infrastructure to suport multiple btree implementations (CVS 894) (check-in: 79b3aed2a7 user: paul tags: trunk) | |