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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-45458] Test mapReduce performance without $_internalJsEmit</title>
                <link>https://jira.mongodb.org/browse/SERVER-45458</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Compare legacy mapReduce performance (on 4.2) to equivalent aggregation pipeline which uses a normal $project stage rather than one with $_internalJsEmit (replica set only).&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;</description>
                <environment></environment>
        <key id="1082988">SERVER-45458</key>
            <summary>Test mapReduce performance without $_internalJsEmit</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="13202">Works as Designed</resolution>
                                        <assignee username="eric.cox@mongodb.com">Eric Cox</assignee>
                                    <reporter username="david.percy@mongodb.com">David Percy</reporter>
                        <labels>
                            <label>qopt-team</label>
                    </labels>
                <created>Thu, 9 Jan 2020 20:59:02 +0000</created>
                <updated>Fri, 27 Oct 2023 13:52:58 +0000</updated>
                            <resolved>Fri, 28 Feb 2020 20:44:50 +0000</resolved>
                                                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="2918048" author="eric.cox" created="Fri, 28 Feb 2020 20:23:26 +0000"  >&lt;p&gt;It looks like we have a consistent ~8.x speed improvement for the various $out replacement strategies&lt;/p&gt;


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&lt;p&gt;Evergreen run is here.&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://evergreen.mongodb.com/task/sys_perf_linux_standalone_map_reduce_workloads_patch_ac7c4b8079b8927bab3fbabf179a5be125c9c4bf_5e58983f1e2d175521d8aa92_20_02_28_04_34_50##%257B%2522compare%2522%253A%255B%257B%2522hash%2522%253A%2522ac7c4b8079b8927bab3fbabf179a5be125c9c4bf%2522%257D%255D%257D&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://evergreen.mongodb.com/task/sys_perf_linux_standalone_map_reduce_workloads_patch_ac7c4b8079b8927bab3fbabf179a5be125c9c4bf_5e58983f1e2d175521d8aa92_20_02_28_04_34_50##%257B%2522compare%2522%253A%255B%257B%2522hash%2522%253A%2522ac7c4b8079b8927bab3fbabf179a5be125c9c4bf%2522%257D%255D%257D&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;</comment>
                            <comment id="2866395" author="david.percy" created="Tue, 11 Feb 2020 20:37:38 +0000"  >&lt;p&gt;A good starting point would probably be one of these benchmarks: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-42695?focusedCommentId=2602350&amp;amp;page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-2602350&quot; class=&quot;external-link&quot; rel=&quot;nofollow&quot;&gt;https://jira.mongodb.org/browse/SERVER-42695?focusedCommentId=2602350&amp;amp;page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-2602350&lt;/a&gt;&lt;/p&gt;</comment>
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