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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-77228] Improve memory layout of NamespaceStringOrUUID</title>
                <link>https://jira.mongodb.org/browse/SERVER-77228</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The &lt;a href=&quot;https://github.com/mongodb/mongo/blob/4f358bd58f40f37d2bcdc7d941890489ed5aa7a1/src/mongo/db/namespace_string.h#L1029-L1041&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;layout&lt;/a&gt; of &lt;tt&gt;NamespaceStringOrUUID&lt;/tt&gt; is composed of many &lt;tt&gt;boost::optional&lt;/tt&gt; s, as well as one unused boolean, adding up to a 102 byte width. Considering how often this type is used in the server, reducing its width to something that can fit on a cache line should improve overall performance. &lt;/p&gt;</description>
                <environment></environment>
        <key id="2343572">SERVER-77228</key>
            <summary>Improve memory layout of NamespaceStringOrUUID</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="matt.broadstone@mongodb.com">Matt Broadstone</assignee>
                                    <reporter username="matt.broadstone@mongodb.com">Matt Broadstone</reporter>
                        <labels>
                    </labels>
                <created>Wed, 17 May 2023 16:18:01 +0000</created>
                <updated>Sun, 29 Oct 2023 21:21:20 +0000</updated>
                            <resolved>Fri, 19 May 2023 13:41:46 +0000</resolved>
                                                    <fixVersion>7.1.0-rc0</fixVersion>
                    <fixVersion>7.0.0-rc2</fixVersion>
                                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="5443122" author="xgen-internal-githook" created="Mon, 22 May 2023 19:06:48 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Matt Broadstone&apos;, &apos;email&apos;: &apos;mbroadst@mongodb.com&apos;, &apos;username&apos;: &apos;mbroadst&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-77228&quot; title=&quot;Improve memory layout of NamespaceStringOrUUID&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-77228&quot;&gt;&lt;del&gt;SERVER-77228&lt;/del&gt;&lt;/a&gt; Improve memory layout of NamespaceStringOrUUID&lt;/p&gt;

&lt;p&gt;(cherry picked from commit c7031fd1ee173dfe2cdbeed5313eb3a6c24d3f14)&lt;br/&gt;
Branch: v7.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/7ce0d319b16575b2bbed56d0f52606936f7345b3&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/7ce0d319b16575b2bbed56d0f52606936f7345b3&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5437685" author="xgen-internal-githook" created="Fri, 19 May 2023 12:43:27 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Matt Broadstone&apos;, &apos;email&apos;: &apos;mbroadst@mongodb.com&apos;, &apos;username&apos;: &apos;mbroadst&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-77228&quot; title=&quot;Improve memory layout of NamespaceStringOrUUID&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-77228&quot;&gt;&lt;del&gt;SERVER-77228&lt;/del&gt;&lt;/a&gt; Improve memory layout of NamespaceStringOrUUID&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/c7031fd1ee173dfe2cdbeed5313eb3a6c24d3f14&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/c7031fd1ee173dfe2cdbeed5313eb3a6c24d3f14&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="2354847">SERVER-77640</issuekey>
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