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Overview
| Comment: | Performance optimization for the OP_Column opcode. |
|---|---|
| Downloads: | Tarball | ZIP archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
076be5474df628bbbfd2b645adba30e1 |
| User & Date: | drh 2015-10-15 21:30:24.579 |
Context
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2015-10-16
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| 12:39 | Improved header comment on the tool/vdbe_profile.tcl script. No changes to code. (check-in: b17ad8fc04 user: drh tags: trunk) | |
| 03:34 | Whenever two or more OP_Column opcodes on the same cursor occur in succession, try to reordering them so that the one that extracts the right-most column is first, so that it will warm up the row cache for all those that follow. This gives a small performance boost. (Leaf check-in: 08e8f04d12 user: drh tags: reorder-column-opcodes) | |
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2015-10-15
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| 21:30 | Performance optimization for the OP_Column opcode. (check-in: 076be5474d user: drh tags: trunk) | |
| 19:21 | Enhance the use of the column cache for UPDATE statements, making them more efficient for the case where a column is modified to be an expression of other unmodified columns. (check-in: 871e091df6 user: drh tags: trunk) | |
Changes
Changes to src/vdbe.c.