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Check-in [4ea4e27dc5]
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Overview
Comment:Update the CPU usage improvement for 3.21.0.
Timelines: family | ancestors | descendants | both | trunk
Files: files | file ages | folders
SHA3-256: 4ea4e27dc5f0954141d72b8348b50e8aea1820f95b0a08515aba4f142e197a79
User & Date: drh 2017-08-30 04:46:03
Context
2017-08-30
04:50
Update the speed-and-size spreadsheet. check-in: 402ce78c69 user: drh tags: trunk
04:46
Update the CPU usage improvement for 3.21.0. check-in: 4ea4e27dc5 user: drh tags: trunk
2017-08-29
13:19
Remove the scratch memory allocator. check-in: d482cfb5ea user: drh tags: trunk
Changes
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Changes to pages/changes.in.

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</ol>
<li> Enhanced the [CSV virtual table] so that it accepts the last row of
     input if the final new-line character is missing.
<li> Remove the rarely-used "scratch" memory allocator.  Replace it with the
     [SQLITE_CONFIG_SMALL_MALLOC] configuration setting that gives SQLite
     a hint large memory allocations should be avoided when possible.
<li> Added the swarm virtual table to the existing union virtual table extension.
<li> Miscellaneous [microoptimizations] reduce CPU usage by about 1.6%.
<li> Bug fixes:
<ol type="a">
<li> Fix a faulty assert() statement discovered by OSSFuzz.
     Ticket [https://sqlite.org/src/info/cb91bf4290c211d|cb91bf4290c211d]
<li> Fix an obscure memory leak in [sqlite3_result_pointer()].
     Ticket [https://sqlite.org/src/info/7486aa54b968e9b|7486aa54b968e9b]
<li> Avoid a possible use-after-free error by deferring schema resets until







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46
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</ol>
<li> Enhanced the [CSV virtual table] so that it accepts the last row of
     input if the final new-line character is missing.
<li> Remove the rarely-used "scratch" memory allocator.  Replace it with the
     [SQLITE_CONFIG_SMALL_MALLOC] configuration setting that gives SQLite
     a hint large memory allocations should be avoided when possible.
<li> Added the swarm virtual table to the existing union virtual table extension.
<li> Miscellaneous [microoptimizations] reduce CPU usage by about 2.0%.
<li> Bug fixes:
<ol type="a">
<li> Fix a faulty assert() statement discovered by OSSFuzz.
     Ticket [https://sqlite.org/src/info/cb91bf4290c211d|cb91bf4290c211d]
<li> Fix an obscure memory leak in [sqlite3_result_pointer()].
     Ticket [https://sqlite.org/src/info/7486aa54b968e9b|7486aa54b968e9b]
<li> Avoid a possible use-after-free error by deferring schema resets until