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50 most recent timeline items

2016-10-01
11:39
[6ac6e446] Leaf: Avoid accessing Vdbe.pc if it is uninitialized. Check Vdbe.magic first. (user: drh, tags: trunk)
00:37
[1e21bbe8] Avoid unnecessary zeroing of fields in the Vdbe object when it is allocated. (user: drh, tags: trunk)
2016-09-30
22:24
[63cf7eaf] Avoid initializing the column-cache section of the Parse object, since entries in the cache will be initialized as they are used, and avoiding the initial memset() saves many CPU cycles. (user: drh, tags: trunk)
21:20
[ab12fce3] Fix an always-true conditional left over from the previous commit. (user: drh, tags: trunk)
20:22
[60285020] Fix the Parse.aColCache column cache so that all of the valid entries are in the first Parse.nColCache slots. (user: drh, tags: trunk)
19:14
[c1419727] Another simplification to the Parse object. (user: drh, tags: trunk)
18:35
[814e41da] Remove unnecessary fields from the Parse object. (user: drh, tags: trunk)
17:46
[47ae1cda] Avoid unnecessary Mem initializations when generating a new sqlite3_stmt object. (user: drh, tags: trunk)
2016-09-29
20:28
[3c93c8f5] Small size and performance optimization to sqlite3VdbeChangeP5(). (user: drh, tags: trunk)
19:50
[984a96d7] Remove the peep-hole optimization of removing OP_Close opcodes that come before OP_Halt, as the extra work of removing those opcodes uses more cycles than just running them. (user: drh, tags: trunk)
19:27
[945f82bc] Size and performance optimization to sqlite3ValueFromExpr() (user: drh, tags: trunk)
15:53
[e2cd79aa] Clarification and typo-fixes in comments. No changes to code. (user: drh, tags: trunk)
2016-09-28
20:42
[cc29ddd6] Use Knuth multiplicative hashing for the symbol table. (user: drh, tags: trunk)
16:15
[06014163] Leaf: Merge recent enhancements from trunk. (user: drh, tags: apple-osx)
16:05
[40c0fb0a] Two more typo fixes in comments. (user: drh, tags: trunk)
16:04
[5bbd071d] Fix typos in comments. No code changes. (user: drh, tags: trunk)
2016-09-27
00:09
[bf903b2e] Update requirements marks due to improvements in the wording of documentation. No changes to code. (user: drh, tags: trunk)
00:03
[0c8b9b21] Fix FTS3 test cases due to the flattener change of the previous check-in. (user: drh, tags: trunk)
2016-09-26
14:39
[cf7f9e6d] When flattening a query of the form "SELECT * FROM (SELECT * FROM tbl WHERE x=?) WHERE y=?", ensure that the final WHERE clause is "x=? AND y=?" instead of "y=? AND x=?". Although it is still not guaranteed, this makes the order in which WHERE clause terms are processed comport more closely to users expectations. (user: dan, tags: trunk)
12:38
[fe89225e] Inline the relevent parts of sqlite3ExprAlloc() into spanExpr(), for a performance improvement. (user: drh, tags: trunk)
2016-09-24
17:42
[795454a3] Omit the LikeOp object from the parser. Change more sqlite3PExpr() calls into sqlite3ExprAlloc() calls. (user: drh, tags: trunk)
01:41
[a8cb1390] Add -DSQLITE_MAX_EXPR_DEPTH=0 to the --lean option on speed-check.sh. (user: drh, tags: trunk)
2016-09-23
21:36
[8a6ea455] Add the EP_Leaf flag bit to the Expr.flags field to indicate Expr nodes that do not have substructure. Use that bit to avoid unnecessary recursion. (user: drh, tags: trunk)
20:59
[afac0709] Use sqlite3ExprAlloc() instead of sqlite3PExpr() for leaf nodes in the expression tree, where appropriate. This is both smaller and faster. (user: drh, tags: trunk)
18:13
[9a5a489d] New test case for the ORDER BY LIMIT optimization. (user: drh, tags: trunk)
18:06
[0c3cafb7] Leaf: Fix the ORDER BY LIMIT optimization backport so that it works when the ORDER BY uses the DESC direction. (user: drh, tags: branch-3.8.9)
2016-09-22
21:37
[ee1382a3] Fix a potential null-pointer dereference and crash in the case where one thread is calling sqlite3_column_text() and another thread is calling sqlite3_step() on the same prepared statement at the same instant. (user: drh, tags: trunk)
18:53
[c3774c6a] Remove the internal sqlite3CodeOnce() interface, replacing it with a direct call to sqlite3VdbeAddOp0(v,OP_Once). Slightly smaller and faster. (user: drh, tags: trunk)
18:46
[5e892d60] Makefile changes to support building winsqlite3.dll using STDCALL rather than CDECL. (user: mistachkin, tags: trunk)
2016-09-21
23:58
[7785b3a2] Fix speedtest1.c so that it works with SQLITE_OMIT_DEPRECATED. Add the --lean and --cachesize options to speed-check.sh. (user: drh, tags: trunk)
19:43
[0741812d] Fix a problem with the fts5 auxiliary function API causing a crash when a query contained a phrase of zero terms. (user: dan, tags: trunk)
19:00
[4a613d85] Do not run vacuummem.test if ENABLE_MEMORY_MANAGEMENT is defined. (user: dan, tags: trunk)
18:18
[2b44f9aa] Fix obsolete requirements marks. Add new tests for VACUUM of attached databases. (user: drh, tags: trunk)
17:53
[be184bef] Avoid running vacuum5.test in auto-vacuum mode. (user: dan, tags: trunk)
17:47
[46b7d19e] Do not run test "delete_db.test" with either the journaltest or inmemoryjournal permutations. Ensure that the multiplexor tests in delete_db.test are performed in non-autovacuum mode. (user: dan, tags: trunk)
14:41
[d4928fb5] Update the fts5vocab table to handle "ORDER BY term" efficiently. (user: dan, tags: trunk)
2016-09-20
22:04 • Fixed ticket [1ec41379]: Integer multiple fails to overflow to floating-point plus 5 other changes (user: drh)
22:04
[db3ebd7c] Improved implementation of 64-bit signed integer multiply that correctly detects overflow (and promotes to floating-point) in some corner cases. Fix for ticket [1ec41379c9c1e400] (user: drh, tags: trunk)
20:33 • New ticket [1ec41379] Integer multiple fails to overflow to floating-point. (user: drh)
17:49
[72429063] Fix harmless compiler warning. (user: mistachkin, tags: trunk)
17:38
[bd3ecbb5] Fix typo in comment. (user: mistachkin, tags: trunk)
01:46
[21b0e3b7] Further performance enhancements in zeroblob() handling. (user: drh, tags: trunk)
01:19
[5e196fd1] Avoid unnecessary calls to ExpandBlob() for smaller and faster code. (user: drh, tags: trunk)
2016-09-19
23:39
[46002511] Very small optimization in the bytecode engine. (user: drh, tags: trunk)
11:00
[2401ea5a] Fix a segfault introduced by the row-value enhancement that comes up on a skip-scan where the first term of the index is unconstrained and the second term is of the form "columm IN (SELECT...)". (user: drh, tags: trunk)
10:24
[75146165] Improved performance in sqlite3ExprCodeTarget(). (user: drh, tags: trunk)
02:19
[c6e6afb9] Small performance optimization in the expression walker. (user: drh, tags: trunk)
2016-09-18
16:08
[6bf5ba10] Revise the implementation of OP_Once so that it is smaller, faster, and uses less memory. This also fixes an obscure bug introduced 3 days ago by check-in [5990a1bdb4a073]. (user: drh, tags: trunk)
2016-09-17
22:46
[baceb988] Minor enhancement to the TclKit batch tool: it should download the TclKit EXE alone when the TCLKIT_NOENV environment variable is set. (user: mistachkin, tags: trunk)
19:34
[63962e2a] Small performance optimization in the freeSpace() routine of btree.c. (user: drh, tags: trunk)