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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-78303] Optimize ScopedTimer</title>
                <link>https://jira.mongodb.org/browse/SERVER-78303</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;ScopedTimer is a hot path, as it is called at least once per query.&lt;/p&gt;

&lt;p&gt;Post v6.0 we added support for both millis and nanos in &lt;a href=&quot;https://github.com/10gen/mongo/blob/6b6c54f8fdb694c408933189220d6f82903ff84a/src/mongo/db/exec/scoped_timer.h#L43-L53&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;ScopedTimer&lt;/a&gt;, and that increased the cost of this mechanism quite a bit. The nanos precision is only used in the explain() path, so we can optimize millis as the overwhelmingly common case. We can also avoid overhead from factory methods by inlining the logic directly at the call sites. Finally we can also construction Optional&amp;lt;ScopedTimer&amp;gt; objects in place to avoid needless moves.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2373797">SERVER-78303</key>
            <summary>Optimize ScopedTimer</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="13201">Fixed</resolution>
                                        <assignee username="colin.stolley@mongodb.com">Colin Stolley</assignee>
                                    <reporter username="colin.stolley@mongodb.com">Colin Stolley</reporter>
                        <labels>
                    </labels>
                <created>Wed, 21 Jun 2023 16:24:46 +0000</created>
                <updated>Sun, 29 Oct 2023 21:19:42 +0000</updated>
                            <resolved>Fri, 30 Jun 2023 16:42:37 +0000</resolved>
                                                    <fixVersion>7.1.0-rc0</fixVersion>
                    <fixVersion>7.0.0-rc7</fixVersion>
                                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="5539539" author="xgen-internal-githook" created="Mon, 3 Jul 2023 00:06:58 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Colin Stolley&apos;, &apos;email&apos;: &apos;colin.stolley@mongodb.com&apos;, &apos;username&apos;: &apos;ccstolley&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-78303&quot; title=&quot;Optimize ScopedTimer&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-78303&quot;&gt;&lt;del&gt;SERVER-78303&lt;/del&gt;&lt;/a&gt;: Optimize ScopedTimer&lt;br/&gt;
Branch: EVG-17874-taskgen-test&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/391dbe555d1d5bb5f29438c83a0e63cca48bed07&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/391dbe555d1d5bb5f29438c83a0e63cca48bed07&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5537434" author="xgen-internal-githook" created="Fri, 30 Jun 2023 17:17:44 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Colin Stolley&apos;, &apos;email&apos;: &apos;colin.stolley@mongodb.com&apos;, &apos;username&apos;: &apos;ccstolley&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-78303&quot; title=&quot;Optimize ScopedTimer&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-78303&quot;&gt;&lt;del&gt;SERVER-78303&lt;/del&gt;&lt;/a&gt;: Optimize ScopedTimer&lt;br/&gt;
Branch: v7.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/8f789459515b22d97fa4e69398bf3e01e2e15919&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/8f789459515b22d97fa4e69398bf3e01e2e15919&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5535226" author="xgen-internal-githook" created="Thu, 29 Jun 2023 21:06:42 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Colin Stolley&apos;, &apos;email&apos;: &apos;colin.stolley@mongodb.com&apos;, &apos;username&apos;: &apos;ccstolley&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-78303&quot; title=&quot;Optimize ScopedTimer&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-78303&quot;&gt;&lt;del&gt;SERVER-78303&lt;/del&gt;&lt;/a&gt;: Optimize ScopedTimer&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/391dbe555d1d5bb5f29438c83a0e63cca48bed07&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/391dbe555d1d5bb5f29438c83a0e63cca48bed07&lt;/a&gt;&lt;/p&gt;</comment>
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