Documentation Source Text

proc chng {date desc {options {}}} {
  global nChng aChng xrefChng
  set aChng($nChng) [list $date $desc $options]
  set xrefChng($date) $nChng
  incr nChng
}

chng {2017-02-13 (3.17.0)} {
<li>Approximately 25% better performance from the [R-Tree extension].
    <ul>
    <li> Uses compiler built-ins (ex: __builtin_bswap32() or _byteswap_ulong())
         for byteswapping when available.
    <li> Uses the [sqlite3_blob] key/value access object instead of SQL
         for pulling content out of R-Tree nodes
    <li> Other miscellaneous enhancements such as loop unrolling.

    into an INNER JOIN.  Fix for ticket
    [https://www.sqlite.org/src/info/25e335f802dd|25e335f802dd].
<li>Use the correct affinity for columns of automatic indexes. Ticket
    [https://www.sqlite.org/src/info/7ffd1ca1d2ad4ec|7ffd1ca1d2ad4ec].
<li>Ensure that the [sqlite3_blob_reopen()] interface can correctly
    handle short rows.  Fix for ticket
    [https://www.sqlite.org/src/info/e6e962d6b0f06f46e|e6e962d6b0f06f46e].
<p><b>Hashes:</b>
<li>SQLITE_SOURCE_ID: "2017-02-13 16:02:40 ada05cfa86ad7f5645450ac7a2a21c9aa6e57d2c"
<li>SHA1 for sqlite3.c: cc7d708bb073c44102a59ed63ce6142da1f174d1

}

chng {2017-01-06 (3.16.2)} {
<li>Fix the [REPLACE] statement for 
    [WITHOUT ROWID] tables that lack secondary indexes so that
    it works correctly with triggers and foreign keys.  This was a new bug
    caused by performance optimizations added in version 3.16.0.

#    ORDER BY mtime DESC;
#
# A small amount of manual editing and de-duplication followed.
#
# Manually edit the list for each subsequent release.
#      
foreach line [split {
ada05cfa86|2017-02-13|version 3.17.0
a65a62893c|2017-01-06|version 3.16.2
979f043928|2017-01-03|Version 3.16.1
04ac0b75b1|2017-01-02|Version 3.16.0
bbd85d235f|2016-11-28|Version 3.15.2
1136863c76|2016-11-04|Version 3.15.1
707875582f|2016-10-14|Version 3.15.0
29dbef4b85|2016-09-12|Version 3.14.2

  regsub -all "\n( *\n)+" $text "</p>\n\n<p>" txt
  regsub -all {[Tt]icket #(\d+)} $txt \
      {<a href="http://www.sqlite.org/cvstrac/tktview?tn=\1">\0</a>} txt
  hd_resolve "<blockquote>$txt</blockquote>"
  hd_puts "<hr width=\"50%\">"
}

newsitem {2017-02-13} {Release 3.17.0} {
SQLite [version 3.17.0] is a regularly scheduled maintenance release.
<p>
Most of the changes in this release are performance optimizations.
Optimizations to the [R-Tree extension] are especially noticeable.
<p>
In this release, the default size of the 
[lookaside buffer] allocated for each database connection
is increased from 64,000 to 120,000 bytes.  This provides improved
performance on many common workloads in exchange for a small increase
in memory usage.
Applications that value a small memory footprint over raw speed
can change the lookaside buffer size back to its old value (or to zero)
using the [SQLITE_DEFAULT_LOOKASIDE] compile-time option, or the
[SQLITE_CONFIG_LOOKASIDE|sqlite3_config(SQLITE_CONFIG_LOOKASIDE)]

<li value="4">The "speedtest1.c" program 
estimates the performance of SQLite under a typical workload.  
<li>The "mptester.c" program is a stress test for multiple processes 
concurrently reading and writing a single database.
<li>The "threadtest3.c" program is a stress test for multiple threads using
SQLite simultaneously.  
<li>The "fuzzershell.c" program is used to
run some <a href="#fuzztesting">fuzz tests</a>.
</ol>
</p>

<p>All of the tests above must run successfully, on multiple platforms
and under multiple compile-time configurations,
before each release of SQLite.</p>