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19 check-ins related to "micro-optimizations"

2017-02-01
23:03
Backout the change in [02f6293f27] as it causes MSVC to complain. check-in: aaae74d0 user: mistachkin tags: trunk
2017-01-31
19:10
Very small performance improvements and size reductions in sqlite3VdbeExec() and blobSeekToRow(). check-in: 85dddf2b user: drh tags: trunk
19:02
Simplifications to blobSeekToRow(). Closed-Leaf check-in: 495ea824 user: drh tags: micro-optimizations
16:49
Remove a C99-style comment. Fixes to the kvtest-speed.sh script. check-in: 91eb6b62 user: drh tags: micro-optimizations
16:43
Remove another unnecessary local variable initialization from sqlite3VdbeExec() check-in: 2361b03b user: drh tags: micro-optimizations
16:34
Remove an unnecessary initialization of the pOp variable in sqlite3VdbeExec(). check-in: 02f6293f user: drh tags: micro-optimizations
15:29
Add the "stat" command to kvtest.c. Also add the --variance option to the "init" command. Add the tool/kvtest-speed.sh script used for doing performance testing on key/value access patterns. check-in: b63deed6 user: drh tags: trunk
2014-09-18
01:29
Merge micro-optimizations into trunk after fixing the build on MSVC. Performance now shows 7.58% faster than the 3.8.6 release on x64 with gcc 4.8.1 and -Os. check-in: 1de558bc user: drh tags: trunk
01:21
Fix compiler warnings and change the nullMem structure initializer into a format that MSVC can understand. Closed-Leaf check-in: 163bfae8 user: drh tags: micro-optimizations
2014-09-17
23:37
Performance improvement and slight size reduction to the comparison operators in the VDBE. check-in: 14052a7d user: drh tags: micro-optimizations
16:41
In the Mem object, stop requiring that Mem.xDel be NULL when the MEM_Dyn bit is clear. Also reduce the amount of initialization of Mem objects. All for a small size reduction and performance increase. check-in: fdddb477 user: drh tags: micro-optimizations
14:52
Improved interface to the Mem object handling. Small size reduction and performance increase. check-in: 4e437844 user: drh tags: micro-optimizations
2014-09-16
21:54
Continuing cleanup of memory register memory allocation handling. check-in: 2598aedc user: drh tags: micro-optimizations
20:05
Make sure registers are cleared properly prior to being used to store the result of an OP_Column operator. check-in: 78fb8838 user: drh tags: micro-optimizations
18:22
Simplification of the OP_Column logic for the case of rows with overflow. check-in: f7367803 user: drh tags: micro-optimizations
14:55
Remove an unused parameter from sqlite3VdbeIdxRowid(). This is cosmetic only as the C-compiler optimizers were already omitting this parameter on amalgamation builds. check-in: a10a6bba user: drh tags: micro-optimizations
14:37
Reduce the number of arguments to RecordCompare functions from 4 to 3, resulting in a small performance increase. check-in: 8239c35a user: drh tags: micro-optimizations
14:16
Reorder the elements of the Mem object for a small size reduction and performance improvement. Moved into a branch because MSVC is unable to handle named structure initializer on nullMem. check-in: 0be3019e user: drh tags: micro-optimizations
13:30
Changes to sqlite3VdbeRecordUnpack() to make it slightly smaller and faster. check-in: 8fb90da7 user: drh tags: trunk