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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <description>This file is an XML representation of an issue</description>
    <language>en-us</language>    <build-info>
        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-63816] Extend non-correlated pipeline prefix caching optimization to $search in $lookup stage</title>
                <link>https://jira.mongodb.org/browse/SERVER-63816</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;$search is called multiple times during $lookup pipeline execution, must be some issues with cache&lt;/p&gt;

&lt;p&gt;related to &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-60800&quot; title=&quot;Allow $search in $lookup/$unionWith&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-60800&quot;&gt;&lt;del&gt;SERVER-60800&lt;/del&gt;&lt;/a&gt;&lt;/p&gt;</description>
                <environment></environment>
        <key id="1986203">SERVER-63816</key>
            <summary>Extend non-correlated pipeline prefix caching optimization to $search in $lookup stage</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="erin.zhu@mongodb.com">Erin Zhu</assignee>
                                    <reporter username="ruslan.abdulkhalikov@mongodb.com">Ruslan Abdulkhalikov</reporter>
                        <labels>
                            <label>query-product-scope-1</label>
                            <label>query-product-urgency-3</label>
                            <label>query-product-value-2</label>
                            <label>query-skunkworks</label>
                    </labels>
                <created>Fri, 18 Feb 2022 06:38:00 +0000</created>
                <updated>Tue, 6 Feb 2024 14:48:06 +0000</updated>
                            <resolved>Tue, 6 Feb 2024 14:48:06 +0000</resolved>
                                                    <fixVersion>8.0.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>8</watches>
                                                                                                                <comments>
                            <comment id="6069922" author="xgen-internal-githook" created="Tue, 6 Feb 2024 03:18:23 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;erinzhu001&apos;, &apos;email&apos;: &apos;erin.zhu@mongodb.com&apos;, &apos;username&apos;: &apos;erinzhu001&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-63816&quot; title=&quot;Extend non-correlated pipeline prefix caching optimization to $search in $lookup stage&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-63816&quot;&gt;&lt;del&gt;SERVER-63816&lt;/del&gt;&lt;/a&gt; Enables caching optimization to $search in $lookup  (#18396)&lt;/p&gt;

&lt;p&gt;GitOrigin-RevId: c08d26d01b364295b871dc5f5537b7666fef6013&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/3d66fc28dca302cfa5c1862646f2f50e058aa88d&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/3d66fc28dca302cfa5c1862646f2f50e058aa88d&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4363844" author="david.storch" created="Fri, 18 Feb 2022 14:29:03 +0000"  >&lt;p&gt;The &lt;tt&gt;$search&lt;/tt&gt; stage itself is always non-correlated because there is no way to refer to a correlated let variable in the &lt;tt&gt;$search&lt;/tt&gt; stage. Therefore, I think the caching optimization with &lt;tt&gt;DocumentSourceSequentialDocumentCache&lt;/tt&gt; could help performance quite a bit if the search results fit within the 100MB cache size limit. &lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
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                    <name>Duplicate</name>
                                                                <inwardlinks description="is duplicated by">
                                        <issuelink>
            <issuekey id="2374641">SERVER-78327</issuekey>
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            <issuekey id="1901655">SERVER-60800</issuekey>
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