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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-76898] Optimize string construction in NamespaceString </title>
                <link>https://jira.mongodb.org/browse/SERVER-76898</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;We missed a few optimizations in the &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-75529&quot; title=&quot;Revisit memory layout for TenantId, DatabaseName, and NamespaceString to address performance regression&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-75529&quot;&gt;&lt;del&gt;SERVER-75529&lt;/del&gt;&lt;/a&gt; refactor:&lt;/p&gt;
&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;use &lt;tt&gt;str::stream&lt;/tt&gt; when &lt;a href=&quot;https://github.com/mongodb/mongo/blob/0417f5dae1f8d20caec7646982a49124c2b44c5f/src/mongo/db/namespace_string.h#L881&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;constructing from a DatabaseName&lt;/a&gt;&lt;/li&gt;
	&lt;li&gt;eliminate a &lt;a href=&quot;https://github.com/mongodb/mongo/blob/0417f5dae1f8d20caec7646982a49124c2b44c5f/src/mongo/db/namespace_string.h#L876&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;string allocation&lt;/a&gt; used only for validation&lt;/li&gt;
	&lt;li&gt;&lt;del&gt;use &lt;tt&gt;fmt::format&lt;/tt&gt; instead of &lt;tt&gt;str::stream&lt;/tt&gt; for all string building&lt;/del&gt;&lt;/li&gt;
&lt;/ul&gt;
</description>
                <environment></environment>
        <key id="2333954">SERVER-76898</key>
            <summary>Optimize string construction in NamespaceString </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>Fri, 5 May 2023 21:58:23 +0000</created>
                <updated>Sun, 29 Oct 2023 21:21:53 +0000</updated>
                            <resolved>Tue, 9 May 2023 14:28:18 +0000</resolved>
                                                    <fixVersion>7.1.0-rc0</fixVersion>
                    <fixVersion>7.0.0-rc1</fixVersion>
                                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="5412585" author="xgen-internal-githook" created="Tue, 9 May 2023 19:27:06 +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-76898&quot; title=&quot;Optimize string construction in NamespaceString &quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-76898&quot;&gt;&lt;del&gt;SERVER-76898&lt;/del&gt;&lt;/a&gt; Optimize string construction in NamespaceString&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 4407a9176ed806546471200e57a3ceff65903a93)&lt;br/&gt;
Branch: v7.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/1adc6f37a5c6b3ca4931e22c51450b7e0eb31acf&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/1adc6f37a5c6b3ca4931e22c51450b7e0eb31acf&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5410003" author="xgen-internal-githook" created="Mon, 8 May 2023 22:43:09 +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-76898&quot; title=&quot;Optimize string construction in NamespaceString &quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-76898&quot;&gt;&lt;del&gt;SERVER-76898&lt;/del&gt;&lt;/a&gt; Optimize string construction in NamespaceString&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/4407a9176ed806546471200e57a3ceff65903a93&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/4407a9176ed806546471200e57a3ceff65903a93&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5405989" author="matt.broadstone" created="Sat, 6 May 2023 12:34:28 +0000"  >&lt;p&gt;profiling revealed that &lt;tt&gt;fmt::format&lt;/tt&gt; is still less performant than &lt;tt&gt;StringBuilder&lt;/tt&gt;, stricken from the list. &lt;/p&gt;</comment>
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