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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[SERVER-21312] $lookup should batch query requests</title>
                <link>https://jira.mongodb.org/browse/SERVER-21312</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The $lookup stage currently does one query per input document, which can introduce a significant amount of overhead if there are few results. Instead, the $lookup stage should batch up a couple documents and query for their results all at once.&lt;/p&gt;</description>
                <environment></environment>
        <key id="237997">SERVER-21312</key>
            <summary>$lookup should batch query requests</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="10038" iconUrl="https://jira.mongodb.org/images/icons/subtask.gif" description="">Backlog</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="backlog-query-optimization">Backlog - Query Optimization</assignee>
                                    <reporter username="charlie.swanson@mongodb.com">Charlie Swanson</reporter>
                        <labels>
                            <label>optimization</label>
                            <label>perfomance</label>
                    </labels>
                <created>Thu, 5 Nov 2015 19:52:16 +0000</created>
                <updated>Tue, 6 Dec 2022 04:40:28 +0000</updated>
                                            <version>3.2.0-rc2</version>
                                                    <component>Aggregation Framework</component>
                                        <votes>9</votes>
                                    <watches>24</watches>
                                                                                                                <comments>
                            <comment id="4760680" author="xiaoqiang.chou@gmail.com" created="Thu, 18 Aug 2022 15:19:35 +0000"  >&lt;p&gt;Any plan to make this improvement?&lt;/p&gt;</comment>
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