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    <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-81183] Investigate $linearFill performance regressions</title>
                <link>https://jira.mongodb.org/browse/SERVER-81183</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description></description>
                <environment></environment>
        <key id="2445756">SERVER-81183</key>
            <summary>Investigate $linearFill performance regressions</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</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="projjal.chanda@mongodb.com">Projjal Chanda</assignee>
                                    <reporter username="rui.liu@mongodb.com">Rui Liu</reporter>
                        <labels>
                    </labels>
                <created>Tue, 19 Sep 2023 10:37:28 +0000</created>
                <updated>Thu, 28 Sep 2023 14:45:26 +0000</updated>
                            <resolved>Thu, 28 Sep 2023 14:45:26 +0000</resolved>
                                                                                        <votes>0</votes>
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                                                                                                                <comments>
                            <comment id="5737694" author="JIRAUSER1272665" created="Thu, 28 Sep 2023 14:43:52 +0000"  >&lt;p&gt;The regressions are only on multiple partition tests which involve addition and remove of temporary field. The extra projection stages lead to the regression. There is an in-review ticket &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-80175&quot; title=&quot;Do not materialize a new document when pushing down a projection that only adds temporary fields&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-80175&quot;&gt;&lt;del&gt;SERVER-80175&lt;/del&gt;&lt;/a&gt; to fix this so closing this pr.&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://spruce.mongodb.com/task/sys_perf_linux_standalone.2022_11_linear_fill_1a474953[&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://spruce.mongodb.com/task/sys_perf_linux_standalone.2022_11_linear_fill_1a474953[&lt;/a&gt;&#8230;]22_43_18/trend-charts?execution=0&amp;amp;sortBy=STATUS&amp;amp;sortDir=ASC and&lt;br/&gt;
&lt;a href=&quot;https://spruce.mongodb.com/task/sys_perf_linux_standalone_sbe.2022_11_linear_fill_1a47[&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://spruce.mongodb.com/task/sys_perf_linux_standalone_sbe.2022_11_linear_fill_1a47[&lt;/a&gt;&#8230;]22_43_18/trend-charts?execution=0&amp;amp;sortBy=STATUS&amp;amp;sortDir=ASC&lt;/p&gt;</comment>
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