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2014-08-28
19:38
[fdd478bb11] Leaf: Improved WHERETRACE messages for the estimated output row reductions from range scans. (user: drh, tags: trunk)
17:30
[a9daf3ac44] Fix a problem causing an inaccurate stat4-based estimate for the number of rows visited by a range scan. (user: drh, tags: trunk)
13:42
[c931ca2b77] Fix a formatting error ("%d" needed in place of "%g") on a WHERETRACE macro inside of the query planner. This fix applies to debugging logic only. (user: drh, tags: trunk)
2014-08-27
23:18
[bdb6e4978d] Refactor the sqlite3PcacheFetch() routine into three separate routines, which are significantly faster overall and about 100 bytes smaller in size as well. (user: drh, tags: trunk)
17:53
[029a6dc744] Add a VDBE synopsis comment for clarification. (user: mistachkin, tags: trunk)
17:48
[d8b1c43361] Add a missing ticket number to a comment in index7.test. (user: dan, tags: trunk)
17:37
[fcebca166f] When determining whether or not a partial index is usable, do not assume that the cursor number assigned to each table in the query is the same as its index in the FROM clause. Fix for ticket [98d973b8f5]. (user: dan, tags: trunk)
14:14
[6c1ee3e388] In the sqlite3_context object, keep a pointer to the result value rather than storing the result value in the sqlite3_context object and using memcpy() to move the value back into its register after the function returns. This runs faster and saves over 500 bytes of code space. (user: drh, tags: trunk)
03:28
[1624916c6e] Factor out the exception paths from sqlite3ValueToText() into a separate function so that the main routine is much faster for the common case of no required type or encoding conversions. (user: drh, tags: trunk)
00:50
[f94cacc393] Performance enhancement in sqlite3VdbeMemNulTerminate(). (user: drh, tags: trunk)
2014-08-26
15:06
[f1f94a971e] Change the page cache so that a new sqlite3_pcache object is allocated as soon as the page cache is opened, not delayed until the first fetch request. This give a noticable performance boost. The interface between pager and the page cache has changed slightly, which might break ZIPVFS. (user: drh, tags: trunk)
2014-08-25
22:37
[af364cce9d] Add an assert() and five testcase() macros to the OP_Cast opcode implementation to help verify that it is fully tested. (user: drh, tags: trunk)
21:11
[1ad70ec550] Minor changes to the CAST logic to make it more testable. (user: drh, tags: trunk)
20:21
[42505e5a81] Test cases added for using unary "+" and CAST operators on the RHS of range constraints and verifying that STAT3/4 can use those constraints. (user: drh, tags: trunk)
20:11
[91d8a8d0b7] Allow CAST expressions and unary "+" operators to be used in the DEFAULT argument of an ALTER TABLE ADD COLUMN and to be understand on the RHS of range constraints interpreted by STAT3/4. This involves a rewrite of the implementation of the CAST operator. (user: drh, tags: trunk)
18:29
[e06dc6f0c3] In cases where stat4 data is available but cannot be used because the rhs of a range constraint is too complex a expression, fall back to using the default estimates for number of rows scanned. (user: dan, tags: trunk)
11:33
[54164ce47c] Remove the pager_lookup() function since it is redundant with sqlite3PagerLookup(). (user: drh, tags: trunk)
11:20
[3ca5846da7] Change the name of the VdbeMemRelease() macro to VdbeMemReleaseExtern() to more accurately reflect what it does. Performance enhancement to the sqlite3VdbeMemRelease() function. (user: drh, tags: trunk)
2014-08-24
02:53
[0c7e1b875a] The sqlite3VdbeChangeEncoding() routine goes about 3x faster if the sqlite3VdbeMemTranslate() subroutine is not inlined. (user: drh, tags: trunk)
01:32
[c63311e2f3] Patch the sqlite3PagerWrite() method in the Pager to run a bit faster. (user: drh, tags: trunk)
2014-08-23
23:15
[0371cc3bb0] Faster implementation of pcache1Fetch() (user: drh, tags: trunk)
20:25
[bd41d394d4] Faster implementation of the sqlite3ApiExit() routine. (user: drh, tags: trunk)
19:42
[6da6f46d0c] Another memory allocator performance optimization. (user: drh, tags: trunk)
19:08
[45abd5c0ba] Fix a variable-declaration after code problem in btree.c. Harmless in GCC and CLANG but unacceptable for MSVC. (user: drh, tags: trunk)
19:04
[f83daa16f6] Changes to sqlite3ScratchMalloc() that make the entire memory allocation interface a little faster and about 100 bytes smaller. (user: drh, tags: trunk)
18:17
[802148f311] Make the implementation of the sqlite3_aggregate_context() interface faster for second an subsequent invocations. This helps all aggregate functions to perform better. (user: drh, tags: trunk)
17:41
[0c0a603950] Improved performance in the type handling of arithmetic operators in the VDBE. (user: drh, tags: trunk)
17:21
[25f2246be4] Performance optimization in the applyAffinity() logic inside the VDBE. (user: drh, tags: trunk)
2014-08-22
23:33
[ce123b5c59] Another performance tweak: Split the sqlite3BtreeCursorHasMoved() routine into two with the second routine named sqlite3BtreeCursorRestore(). The first now only reports whether or not the cursor has moved and the second tries to restore the cursor. This allows the sqlite3VdbeCursorMoveto() routine to be refactored to avoid stack pointer movements, for a noticable performance gain. (user: drh, tags: trunk)
22:26
[3eb0843903] Factor the saveAllCursors() routine of btree.c into two separate routines, for a noticable performance improvement. (user: drh, tags: trunk)
21:58
[8914530644f] Performance enhancements in the b-tree mutex logic. (user: drh, tags: trunk)
20:35
[6bcf1af6a4] Combine the pcacheAddToDirtyList() and pcacheRemoveFromDirtyList() routines into a single pcacheManageDirtyList() routine. The resulting binary code is slightly faster and a few bytes smaller. (user: drh, tags: trunk)
18:48
[a929be5519] Performance enhancement in sqlite3PutVarint(). (user: drh, tags: trunk)
18:00
[cf561d1f0b] Split the sqlite3Error() routine into sqlite3Error() and sqlite3ErrorWithMsg(), for a slight size reduction and performance increase. (user: drh, tags: trunk)
15:40
[f7f2160db0] Performance improvement in the printf() logic by avoiding unnecessary stack pointer movement. (user: drh, tags: trunk)
15:19
[ebc10e46c1] Improve the performance and reduce the size of the sqlite3VdbeSerialGet() routine by avoiding the use of stack. (user: drh, tags: trunk)
13:22
[750bb0a096] Change a while-loop into a do-loop in sqlite3VdbeSerialPut() for a small size reduction and performance improvement. (user: drh, tags: trunk)
11:11
[369c480cda] Enhance the spellfix extension with the ability to specify a rowid when inserting new rows. (user: drh, tags: trunk)
2014-08-21
20:26
[14b0f561fe] Simplify the interface to the symbol table, saving 600 bytes of code space. (user: drh, tags: trunk)
14:10
[7029b3404d] Fix a faulty assert() statement. Add comments to clarify the behavior of the sqlite3OpenTableAndIndices() routine in insert.c. Add test cases to verify that the assert() statement is not firing inappropriately. Ticket [369d57fb8e5ccdff06f1]. (user: drh, tags: trunk)
2014-08-20
23:42
[91594aae07] Increase the version number to 3.8.7 (user: drh, tags: trunk)
23:38
[bc985caa78] Enhancements to skip-scan such that it is operable when a middle column of an index is skipped while the left-most column is constrained in the WHERE clause. (user: drh, tags: trunk)
18:43
[49f44d355f] A small performance improvement in freeSpace() by special-casing the relatively common case of an empty freelist. (user: drh, tags: trunk)
17:56
[fe4fd014b4] Reimplement the freeSpace() routine in btree.c so that it runs faster. (user: drh, tags: trunk)
14:37
[7e63089a19] Refactor local variable names in the freeSpace() routine of btree.c for improved understandability. (user: drh, tags: trunk)
13:35
[121308fa86] Size reduction and performance improvements in btree.c and the allocateSpace() routine. Also fix an assert() in freeSpace(). (user: drh, tags: trunk)
13:25
[eea0661798] Add SQLITE_API macros in front of interface routines in the test_intarray.c extension. (user: drh, tags: trunk)
10:42
[6c66beae97] Fix a typo in the showdb usage message. (user: dan, tags: trunk)
00:54
[73637d12e3] Minor performance improvement and size reduction for the btree-page space allocator. (user: drh, tags: trunk)
2014-08-19
23:04
[d280157da0] Modify the memsubsys1-3.1.4 test so that it does not fail arbitrarily due to variations in the behavior of system malloc(). (user: drh, tags: trunk)
20:41
[44d5bd4cc3] A better fix for the sqlite3_trace() problem. Ticket [11d5aa455e0d98f3c1e6a] (user: drh, tags: trunk)
20:27
[0d4d3df4bc] Make sure the sqlite3_trace() callback is invoked, even if the prepared statement was marked "expired" before it ever entered sqlite3_step(). Ticket [11d5aa455e0d98f3c1e6a08]. (user: drh, tags: trunk)
19:28
[d09d63c077] Improvements to output formatting with the ".trace" command in the command-line shell. (user: drh, tags: trunk)
09:15
[f10a611126] Minor changes to do with the Tcl tea extension package autoconf system. (user: dan, tags: trunk)
2014-08-18
13:45
[11a70e1ae7] Refactor the names of state objects in the command-line shell implementation.. (user: drh, tags: trunk)
2014-08-15
16:13
[28a379fcd4] Fix compiler warnings on WinCE. (user: drh, tags: trunk)
11:46
[9491ba7d73] Version 3.8.6 (user: drh, tags: trunk, release, version-3.8.6)