This Day In History For 2018-12-12

1 Year Ago (more context)

2017-12-12
20:28		Add tests and fixes for the shell ".ar" command -f option. (check-in: 1a9867973c user: dan tags: sqlar-shell-support)
20:04		Add support for parsing options in non-traditional tar form to the ".ar" command. Have writefile() attempt to create any missing path components. And not to throw an exception if it is called to create a directory that already exists. (check-in: 38dbeb1e77 user: dan tags: sqlar-shell-support)
18:17		Merge latest begin-concurrent changes into this branch. (check-in: 3fde0b4d05 user: dan tags: begin-concurrent-pnu)

2 Years Ago (more context)

2016-12-12
23:24		Add the --mmap option to the speedtest1 program and to the speed-check.sh script that is frequently used to run speedtest1. (check-in: 1a636d5e0e user: drh tags: trunk)
18:12		Remove unnecessary MemPage initialization resets in the autovacuum ptrmap processing. (check-in: 1b36fbb9f0 user: drh tags: trunk)
16:15		Merge all the latest performance enhancements from trunk. (check-in: a24f805b5e user: drh tags: apple-osx)
16:08		Faster operation for large in-memory databases. (check-in: 9675518b33 user: drh tags: trunk)
12:58		Merge recent enhancements from trunk. (check-in: dc006e08b8 user: drh tags: est_count_pragma)
11:05		Performance optimization in sqlite3PagerWrite(). (check-in: d4dff10a3d user: drh tags: trunk)
01:53		Updates to the tokenizer for EBCDIC. No changes for standard builds. (check-in: 4fc6580ffa user: drh tags: trunk)
01:30		Size and performance optimization in btreeInitPage() in the freeblock validation step. (check-in: 57deb1b412 user: drh tags: trunk)
00:58		Change the order of comparison for divider cell overflow in balance non-root to avoid a (harmless) reference to an uninitialized variable. (check-in: f9f2e23bbd user: drh tags: trunk)

3 Years Ago (more context)

2015-12-12
19:23		Update some stale comments in delete.c. No changes to code. (Leaf check-in: f59a33260c user: dan tags: onepass-delete-or)
17:31		Add further tests for the changes on this branch. Also fix a memory-leak that could follow a malloc failure. (check-in: 21526012c2 user: dan tags: onepass-delete-or)

4 Years Ago (more context)

2014-12-12
23:17		Add extra tests to threadtest4.c. Fix a benign data race accessing the text encoding using ENC(db). (check-in: d7bb7ea4ab user: drh tags: trunk)
16:39		Add extra tests to threadtest3. (check-in: f6bf86f907 user: dan tags: trunk)
01:27		Add new tests to the threadtest4.c program. Fix a long-standing data race in WAL mode for shared-cache. (check-in: d8d3e6d04c user: drh tags: trunk)
00:52		Remove the KeyInfo cache (for now - perhaps we will add it back in later - or maybe not since it provides negligible benefit but adds a lot of complexity and thread-safety risk). Add a mutex to ATTACH to deal with a data race. (check-in: 03c443eaf2 user: drh tags: trunk)
00:40		Make sure the Btree mutex is held when setting the locking mode and the secure delete flag when attaching a shared-cache database. (Closed-Leaf check-in: 6bef7ede2b user: drh tags: threadtest4)
00:26		Merge the cell overflow page number cache thread race fix from trunk. (check-in: cefad47ec2 user: drh tags: threadtest4)
00:20		Fix a bug in the threadtest4.c program. Remove the keyinfo cache as it provides minimal performance improvements, and then only at SQL preparation time, not at runtime, and it has problems with data races in shared-cache mode. We might later add the keyinfo cache back but only enable it when shared-cache mode is off. (check-in: b7489f9451 user: drh tags: threadtest4)

10 Years Ago (more context)

2008-12-12
19:19		Add many new integer boundary value tests. Ticket #3536. (CVS 6025) (check-in: 45277238d3 user: drh tags: trunk)
17:56		Rework the rowid lookup logic in the query optimizer to fix various boundary value problems. Ticket #3536. Renamed the OP_MoveXX opcodes to OP_SeekXX. (CVS 6024) (check-in: e545490a28 user: drh tags: trunk)