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Overview
SHA1 Hash:7113f9f1696d15871a6fbef3f0c44a63f03863ba
Date: 2013-11-21 23:43:43
User: drh
Comment:Update the change log to mention recent VDBE performance enhancements.
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    [sqlite3_index_info] object to allow a virtual table to report its estimate
    on the number of rows that will be returned by a query.
<li>Update the [R-Tree extension] to make use of the enhanced virtual table
    interface.
<li>Add the [SQLITE_ENABLE_EXPLAIN_COMMENTS] compile-time option.
<li>Enhanced the comments that are inserted into [EXPLAIN] output when the
    [SQLITE_ENABLE_EXPLAIN_COMMENTS] compile-time option is enabled.



<li>Enhanced the ".explain" output formatting of the [command-line shell]
    so that loops are indented to better show the structure of the program.
<li>Enhanced the ".timer" feature of the [command-line shell] so that it
    shows wall-clock time in addition to system and user times.
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    [sqlite3_index_info] object to allow a virtual table to report its estimate
    on the number of rows that will be returned by a query.
<li>Update the [R-Tree extension] to make use of the enhanced virtual table
    interface.
<li>Add the [SQLITE_ENABLE_EXPLAIN_COMMENTS] compile-time option.
<li>Enhanced the comments that are inserted into [EXPLAIN] output when the
    [SQLITE_ENABLE_EXPLAIN_COMMENTS] compile-time option is enabled.
<li>Performance enhancements in the VDBE, especially to the OP_Column opcode.
<li>Factor constant subexpressions in inner loops out to the initialization code
    in prepared statements.
<li>Enhanced the ".explain" output formatting of the [command-line shell]
    so that loops are indented to better show the structure of the program.
<li>Enhanced the ".timer" feature of the [command-line shell] so that it
    shows wall-clock time in addition to system and user times.
}

chng {2013-10-17 (3.8.1)} {