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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-38077] Optimize ProjectionNode output for inclusion projections</title>
                <link>https://jira.mongodb.org/browse/SERVER-38077</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;As part of the work on &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-35493&quot; title=&quot;Planning support for &amp;quot;field name or array index&amp;quot; path components in star indexes&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-35493&quot;&gt;&lt;del&gt;SERVER-35493&lt;/del&gt;&lt;/a&gt;, we unified the majority of the logic for &lt;tt&gt;InclusionNode&lt;/tt&gt; and &lt;tt&gt;ExclusionNode&lt;/tt&gt; into a &lt;tt&gt;ProjectionNode&lt;/tt&gt; base class. Because this class must agnostically support any projection type, &lt;b&gt;inclusions&lt;/b&gt; now write to the output document using &lt;tt&gt;MutableDocument::setField&lt;/tt&gt; rather than &lt;tt&gt;MutableDocument::addField&lt;/tt&gt;, since &lt;b&gt;exclusions&lt;/b&gt; cannot use &lt;tt&gt;addField&lt;/tt&gt;. For large inclusion projections, however, this introduces a per-field performance hit, as &lt;tt&gt;setField&lt;/tt&gt;&apos;s lookup-and-replace behaviour is slower than &lt;tt&gt;addField&lt;/tt&gt;&apos;s straightforward append.&lt;/p&gt;</description>
                <environment></environment>
        <key id="632109">SERVER-38077</key>
            <summary>Optimize ProjectionNode output for inclusion projections</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="13201">Fixed</resolution>
                                        <assignee username="bernard.gorman@mongodb.com">Bernard Gorman</assignee>
                                    <reporter username="bernard.gorman@mongodb.com">Bernard Gorman</reporter>
                        <labels>
                    </labels>
                <created>Sun, 11 Nov 2018 02:21:18 +0000</created>
                <updated>Sun, 29 Oct 2023 22:26:38 +0000</updated>
                            <resolved>Wed, 14 Nov 2018 18:17:04 +0000</resolved>
                                                    <fixVersion>4.1.6</fixVersion>
                                    <component>Aggregation Framework</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="2062050" author="xgen-internal-githook" created="Wed, 14 Nov 2018 18:16:37 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Bernard Gorman&apos;, &apos;email&apos;: &apos;bernard.gorman@gmail.com&apos;, &apos;username&apos;: &apos;gormanb&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-38077&quot; title=&quot;Optimize ProjectionNode output for inclusion projections&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-38077&quot;&gt;&lt;del&gt;SERVER-38077&lt;/del&gt;&lt;/a&gt; Optimize ProjectionNode output for inclusion projections&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/fc22660898e77f3dae9d00e0e02498078b7a2399&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/fc22660898e77f3dae9d00e0e02498078b7a2399&lt;/a&gt;&lt;/p&gt;</comment>
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