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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-12667] improve the performance of complex counts</title>
                <link>https://jira.mongodb.org/browse/SERVER-12667</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;In &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-1752&quot; title=&quot;improve the performance of simple counts&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-1752&quot;&gt;&lt;del&gt;SERVER-1752&lt;/del&gt;&lt;/a&gt; you have optimized the speed for simple queries count&lt;br/&gt;
 db.Comment.count(&lt;/p&gt;
{appId:1,topicId:1}
&lt;p&gt;)&lt;/p&gt;

&lt;p&gt;I think it would be very usefull an improvement for more complex queries.&lt;br/&gt;
Now for large collections counts like this are very slow&lt;br/&gt;
 db.Comment.count({appId:{$in:&lt;span class=&quot;error&quot;&gt;&amp;#91;1,2&amp;#93;&lt;/span&gt;}})&lt;br/&gt;
 db.Comment.count({$or:[&lt;/p&gt;
{appId:1}
&lt;p&gt;, &lt;/p&gt;
{appId:2}
&lt;p&gt;]})&lt;/p&gt;</description>
                <environment></environment>
        <key id="110268">SERVER-12667</key>
            <summary>improve the performance of complex counts</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="3">Duplicate</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="ovi_mihai">Ovidiu Anicai</reporter>
                        <labels>
                    </labels>
                <created>Mon, 10 Feb 2014 16:25:33 +0000</created>
                <updated>Wed, 10 Dec 2014 23:05:42 +0000</updated>
                            <resolved>Fri, 20 Jun 2014 20:51:09 +0000</resolved>
                                                                    <component>Querying</component>
                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="629572" author="thomasr" created="Fri, 20 Jun 2014 20:50:54 +0000"  >&lt;p&gt;Hi Ovidiu, thanks for opening this request. We&apos;re already tracking the performance of distinct and complex count queries on &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-9883&quot; title=&quot;Performance issues with distinct and count queries&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-9883&quot;&gt;&lt;del&gt;SERVER-9883&lt;/del&gt;&lt;/a&gt;, as such I&apos;ll close this one as duplicate. Feel free to watch and comment on the other issue.&lt;/p&gt;

&lt;p&gt;Regards,&lt;br/&gt;
Thomas&lt;/p&gt;
</comment>
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