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        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-26964] Make FieldPath more efficient</title>
                <link>https://jira.mongodb.org/browse/SERVER-26964</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Profiling of $graphLookup under SERVER-23992 has raised calls to FieldPath::fullPath() as the top consumer of CPU resources. This is due to string concatenation operations which combine field path elements, performed on every call.&lt;/p&gt;</description>
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        <key id="330691">SERVER-26964</key>
            <summary>Make FieldPath more efficient</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="james.wahlin@mongodb.com">James Wahlin</assignee>
                                    <reporter username="james.wahlin@mongodb.com">James Wahlin</reporter>
                        <labels>
                    </labels>
                <created>Wed, 9 Nov 2016 14:44:27 +0000</created>
                <updated>Sat, 19 Nov 2016 00:05:32 +0000</updated>
                            <resolved>Tue, 15 Nov 2016 19:51:50 +0000</resolved>
                                                    <fixVersion>3.4.0-rc4</fixVersion>
                                    <component>Aggregation Framework</component>
                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="1434884" author="xgen-internal-githook" created="Tue, 15 Nov 2016 19:50:18 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;jameswahlin&apos;, u&apos;name&apos;: u&apos;James Wahlin&apos;, u&apos;email&apos;: u&apos;james.wahlin@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-26964&quot; title=&quot;Make FieldPath more efficient&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-26964&quot;&gt;&lt;del&gt;SERVER-26964&lt;/del&gt;&lt;/a&gt; Make FieldPath more efficient&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/e0b312bbe4f2c50470560b92fbcfbdd3e0471d2f&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/e0b312bbe4f2c50470560b92fbcfbdd3e0471d2f&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1434706" author="james.wahlin@10gen.com" created="Tue, 15 Nov 2016 17:43:12 +0000"  >&lt;p&gt;After finding that targeted improvement of FieldPath::fullPath() for $graphLookup hurts performance in other areas, we decided to proceed with a broader overhaul of the FieldPath class for performance. This ticket will handle this work.&lt;/p&gt;</comment>
                            <comment id="1430630" author="james.wahlin@10gen.com" created="Wed, 9 Nov 2016 22:08:51 +0000"  >&lt;p&gt;Please note that the fix under this ticket is not meant to be an overhaul of FieldPath and addresses one bottleneck. A follow-up ticket will be entered to do a broader rework of FieldPath post 3.4 release.&lt;/p&gt;</comment>
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