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    <title>MongoDB Jira</title>
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        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-29104] Make sort key generation faster</title>
                <link>https://jira.mongodb.org/browse/SERVER-29104</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;At present, sort key generation is very very slow, and dominates the running time for any blocking sort in the query system. The overall query blocking sort implementation is nearly an order of magnitude slower than aggregation&apos;s blocking sort. If we could speed up query&apos;s sort, we could always push down initial aggregation $sort into the query system, which would allow us to fix issues like &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-7568&quot; title=&quot;Aggregation framework favors non-blocking sorts&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-7568&quot;&gt;&lt;del&gt;SERVER-7568&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;This ticket is to track various optimization fixes to sort key generation.&lt;/p&gt;</description>
                <environment></environment>
        <key id="381886">SERVER-29104</key>
            <summary>Make sort key generation faster</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="6" iconUrl="https://jira.mongodb.org/images/icons/statuses/closed.png" description="The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.">Closed</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="9">Done</resolution>
                                        <assignee username="justin.seyster@mongodb.com">Justin Seyster</assignee>
                                    <reporter username="kyle.suarez@mongodb.com">Kyle Suarez</reporter>
                        <labels>
                    </labels>
                <created>Mon, 8 May 2017 13:36:34 +0000</created>
                <updated>Tue, 10 Dec 2019 20:30:25 +0000</updated>
                            <resolved>Tue, 10 Dec 2019 20:28:20 +0000</resolved>
                                                                    <component>Querying</component>
                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="2597455" author="justin.seyster" created="Tue, 10 Dec 2019 20:28:20 +0000"  >&lt;p&gt;We completed all planned perf work on sort keys with &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-42836&quot; title=&quot;Make sort key generation for WorkingSetMembers use Document instead of BSONObj&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-42836&quot;&gt;&lt;del&gt;SERVER-42836&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;</comment>
                            <comment id="1566906" author="xgen-internal-githook" created="Mon, 8 May 2017 16:03:25 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;ksuarz&apos;, u&apos;name&apos;: u&apos;Kyle Suarez&apos;, u&apos;email&apos;: u&apos;kyle.suarez@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-29104&quot; title=&quot;Make sort key generation faster&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-29104&quot;&gt;&lt;del&gt;SERVER-29104&lt;/del&gt;&lt;/a&gt; move vectors into getKeysImplWithArray&lt;/p&gt;

&lt;p&gt;Moving rather than copying is a significant performance win for the&lt;br/&gt;
non-array case.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/f4ede8222be93b34c747e3062322c9adaee12f0b&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/f4ede8222be93b34c747e3062322c9adaee12f0b&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="987861">SERVER-44383</issuekey>
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