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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-84300] Avoid reading the clock to compute $$NOW</title>
                <link>https://jira.mongodb.org/browse/SERVER-84300</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=erin.zhu%40mongodb.com&quot; class=&quot;user-hover&quot; rel=&quot;erin.zhu@mongodb.com&quot;&gt;erin.zhu@mongodb.com&lt;/a&gt; noticed this show up in some of our query stats profiles while investigating perf changes caused by &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-79736&quot; title=&quot;Hash C++ data structures directly rather than building BSONObj&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-79736&quot;&gt;&lt;del&gt;SERVER-79736&lt;/del&gt;&lt;/a&gt;. I don&apos;t think there&apos;s any reason we need to go into &quot;Date_t::now()&quot; to populate this variable. Definitely we shouldn&apos;t need to for the purposes of reporting query stats. But also in general we may be able to share a clock read from the CurOp object or something rather than re-read the clock which can involve a mutex for a VectorClock.&lt;/p&gt;

&lt;p&gt;Specifically in cmd_with_let_shape.cpp in makeDummyExpCtx, it ends up calling generateRuntimeConstants in variables.cpp where it takes the VectorClock mutex. Actually, this is the path as of &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-79736&quot; title=&quot;Hash C++ data structures directly rather than building BSONObj&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-79736&quot;&gt;&lt;del&gt;SERVER-79736&lt;/del&gt;&lt;/a&gt;, looks like it has changed since then but I assume its doing something similar.&#160;&lt;/p&gt;</description>
                <environment></environment>
        <key id="2528582">SERVER-84300</key>
            <summary>Avoid reading the clock to compute $$NOW</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="charlie.swanson@mongodb.com">Charlie Swanson</assignee>
                                    <reporter username="charlie.swanson@mongodb.com">Charlie Swanson</reporter>
                        <labels>
                            <label>flag-for-2885-backport</label>
                    </labels>
                <created>Tue, 19 Dec 2023 15:24:34 +0000</created>
                <updated>Wed, 20 Dec 2023 18:26:28 +0000</updated>
                            <resolved>Wed, 20 Dec 2023 18:25:00 +0000</resolved>
                                                    <fixVersion>7.3.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="5963721" author="xgen-internal-githook" created="Wed, 20 Dec 2023 18:26:28 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Charlie Swanson&apos;, &apos;email&apos;: &apos;charlie.swanson@mongodb.com&apos;, &apos;username&apos;: &apos;cswanson310&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-84300&quot; title=&quot;Avoid reading the clock to compute $$NOW&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-84300&quot;&gt;&lt;del&gt;SERVER-84300&lt;/del&gt;&lt;/a&gt; Avoid reading the clocks to report query stats (#17689)&lt;/p&gt;

&lt;p&gt;GitOrigin-RevId: 07b392034ba31b422ac623b36cad8982ed25243f&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/6ee82c1062a20b195dcedee81b27f6ee4e6165a3&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/6ee82c1062a20b195dcedee81b27f6ee4e6165a3&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5963231" author="charlie.swanson" created="Wed, 20 Dec 2023 16:08:18 +0000"  >&lt;p&gt;Punting this out of PM-2885 and leaving assigned to &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=charlie.swanson%40mongodb.com&quot; class=&quot;user-hover&quot; rel=&quot;charlie.swanson@mongodb.com&quot;&gt;charlie.swanson@mongodb.com&lt;/a&gt; to resolve. We are closing the epic since all customer-focused work is complete.&lt;/p&gt;</comment>
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                                        <issuelink>
            <issuekey id="2453202">SERVER-85065</issuekey>
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